examples: keep CFG_TUH_VENDOR 0 in tusb_config.h

Removing the obsolete host vendor driver also dropped the `#define CFG_TUH_VENDOR 0`
line from the six example configs that carried it. Put it back: host vendor is
coming, and the configs are where a reader looks for the set of host classes an
example can turn on.

Restored byte-identical to the pre-removal state, each file keeping its own column
alignment. The define is inert today - nothing under src/, hw/ or tools/ reads
CFG_TUH_VENDOR - and it is 0 everywhere, so ci_select still reads the vendor class
as enabled by no example and a change to it still selects nothing.

Note the option's default in src/tusb_option.h is still gone; implementing the
driver will need that back alongside the usbh driver-table entry.
diff --git a/examples/dual/dynamic_switch/src/tusb_config.h b/examples/dual/dynamic_switch/src/tusb_config.h
index c570a24..f3e0163 100644
--- a/examples/dual/dynamic_switch/src/tusb_config.h
+++ b/examples/dual/dynamic_switch/src/tusb_config.h
@@ -148,6 +148,7 @@
 #define CFG_TUH_CDC 0
 #define CFG_TUH_HID 0
 #define CFG_TUH_MSC 0
+#define CFG_TUH_VENDOR 0
 
 // max endpoint pair supported by each device
 #define CFG_TUH_ENDPOINT_MAX 16
diff --git a/examples/host/cdc_msc_hid/src/tusb_config.h b/examples/host/cdc_msc_hid/src/tusb_config.h
index a05fcc9..26fcdd1 100644
--- a/examples/host/cdc_msc_hid/src/tusb_config.h
+++ b/examples/host/cdc_msc_hid/src/tusb_config.h
@@ -113,6 +113,7 @@
 #define CFG_TUH_CDC_PL2303          1 // PL2303 Serial. PL2303 is not part of CDC class, only to re-use CDC driver API
 #define CFG_TUH_HID                 (3*CFG_TUH_DEVICE_MAX) // typical keyboard + mouse device can have 3-4 HID interfaces
 #define CFG_TUH_MSC                 1
+#define CFG_TUH_VENDOR              0
 
 // max device support (excluding hub device): 1 hub typically has 4 ports
 #define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
diff --git a/examples/host/cdc_msc_hid_freertos/src/tusb_config.h b/examples/host/cdc_msc_hid_freertos/src/tusb_config.h
index e269357..8583e71 100644
--- a/examples/host/cdc_msc_hid_freertos/src/tusb_config.h
+++ b/examples/host/cdc_msc_hid_freertos/src/tusb_config.h
@@ -115,6 +115,7 @@
 #define CFG_TUH_CDC_PL2303          1 // PL2303 Serial. PL2303 is not part of CDC class, only to re-use CDC driver API
 #define CFG_TUH_HID                 (3*CFG_TUH_DEVICE_MAX) // typical keyboard + mouse device can have 3-4 HID interfaces
 #define CFG_TUH_MSC                 1
+#define CFG_TUH_VENDOR              0
 
 // max device support (excluding hub device): 1 hub typically has 4 ports
 #define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
diff --git a/examples/host/hid_controller/src/tusb_config.h b/examples/host/hid_controller/src/tusb_config.h
index e12ff36..a5c202f 100644
--- a/examples/host/hid_controller/src/tusb_config.h
+++ b/examples/host/hid_controller/src/tusb_config.h
@@ -106,6 +106,7 @@
 #define CFG_TUH_CDC                 0
 #define CFG_TUH_HID                 (3*CFG_TUH_DEVICE_MAX) // typical keyboard + mouse device can have 3-4 HID interfaces
 #define CFG_TUH_MSC                 0
+#define CFG_TUH_VENDOR              0
 
 // max device support (excluding hub device): 1 hub typically has 4 ports
 #define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
diff --git a/examples/host/msc_file_explorer/src/tusb_config.h b/examples/host/msc_file_explorer/src/tusb_config.h
index f929d49..a9d24c8 100644
--- a/examples/host/msc_file_explorer/src/tusb_config.h
+++ b/examples/host/msc_file_explorer/src/tusb_config.h
@@ -106,6 +106,7 @@
 #define CFG_TUH_MSC                 1
 #define CFG_TUH_CDC                 0
 #define CFG_TUH_HID                 0 // typical keyboard + mouse device can have 3-4 HID interfaces
+#define CFG_TUH_VENDOR              0
 
 // max device support (excluding hub device): 1 hub typically has 4 ports
 #define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
diff --git a/examples/host/msc_file_explorer_freertos/src/tusb_config.h b/examples/host/msc_file_explorer_freertos/src/tusb_config.h
index 905aeba..c3fc462 100644
--- a/examples/host/msc_file_explorer_freertos/src/tusb_config.h
+++ b/examples/host/msc_file_explorer_freertos/src/tusb_config.h
@@ -111,6 +111,7 @@
 #define CFG_TUH_MSC                 1
 #define CFG_TUH_CDC                 0
 #define CFG_TUH_HID                 0 // typical keyboard + mouse device can have 3-4 HID interfaces
+#define CFG_TUH_VENDOR              0
 
 // max device support (excluding hub device): 1 hub typically has 4 ports
 #define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)