hwtracing: Add HW tracing support menu

Make a "HW tracing support" menu and move 2 entries into it.
(No change in Coresight, which is ARM-specific and is only listed for
ARM & ARM64.)

This makes the Device Drivers menu more consistent and prevents these
drivers from being listed at the top level of the Device Drivers menu.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>

drivers/Kconfig

@@ -199,9 +199,7 @@ source "drivers/dax/Kconfig"
 
 source "drivers/nvmem/Kconfig"
 
-source "drivers/hwtracing/stm/Kconfig"
-
-source "drivers/hwtracing/intel_th/Kconfig"
+source "drivers/hwtracing/Kconfig"
 
 source "drivers/fpga/Kconfig"
 

drivers/hwtracing/Kconfig

+menu "HW tracing support"
+
+source "drivers/hwtracing/stm/Kconfig"
+
+source "drivers/hwtracing/intel_th/Kconfig"
+
+endmenu