probe: default to CMSIS-DAP v2

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

src/picoprobe_config.h

diff --git a/src/picoprobe_config.h b/src/picoprobe_config.h
index 4bca6c5..ebccd61 100644
--- a/src/picoprobe_config.h
+++ b/src/picoprobe_config.h
@@ -78,7 +78,7 @@
 
 // Interface config
 #ifndef PICOPROBE_DEBUG_PROTOCOL
-#define PICOPROBE_DEBUG_PROTOCOL PROTO_OPENOCD_CUSTOM
+#define PICOPROBE_DEBUG_PROTOCOL PROTO_DAP_V2
 #endif
 
 #endif