dts: add spi device support for SPI bluetooth modules

Provides HAS_DTS_SPI_DEVICE flag to enable dts based
generation for SPI bluetooth modules

Signed-off-by: Yannis Damigos <giannis.damigos@gmail.com>

drivers/bluetooth/hci/Kconfig

diff --git a/drivers/bluetooth/hci/Kconfig b/drivers/bluetooth/hci/Kconfig
index bc9c5e9..902d817 100644
--- a/drivers/bluetooth/hci/Kconfig
+++ b/drivers/bluetooth/hci/Kconfig
@@ -65,7 +65,7 @@
 config BT_SPI_DEV_NAME
 	string "Device Name of SPI Device for Bluetooth"
 	default "SPI_0"
-	depends on BT_SPI
+	depends on BT_SPI && !HAS_DTS_SPI_DEVICE
 	help
 	  This option specifies the name of SPI device to be used for Bluetooth.
 	  On the controller side, this SPI device is used to encapsulate the
@@ -121,6 +121,7 @@
 config BT_SPI_MAX_CLK_FREQ
 	int "Maximum clock frequency for the HCI SPI interface"
 	default 5000000
+	depends on !HAS_DTS_SPI_DEVICE
 	help
 	  This option specifies the maximum clock rate the HCI SPI
 	  interface is capable of running at.

dts/Kconfig

diff --git a/dts/Kconfig b/dts/Kconfig
index 9429dbe..d992e77 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -34,3 +34,11 @@
 	help
 	  This option specifies that the target platform supports device tree
 	  configuration for SPI.
+
+config HAS_DTS_SPI_DEVICE
+	bool
+	default n
+	depends on HAS_DTS_SPI
+	help
+	  This option specifies that the target platform supports device tree
+	  configuration for spi devices, like sensors or RF modules.