feat(dshot): fix protected kernel link error (__dso_handle)

Fix a protected kernel link failure caused by static initialization
of a shared uORB::Publication in AM32Settings. Which is problematic
for NuttX 12.12.0.

The NuttX 12.12 PX4 protected kernel does not provide __dso_handle.

src/drivers/dshot/CMakeLists.txt

@@ -42,6 +42,7 @@ px4_add_module(
 	MAIN dshot
 	COMPILE_FLAGS
 		-DPARAM_PREFIX="${PARAM_PREFIX}"
+		-fno-use-cxa-atexit
 		# -DDEBUG_BUILD
 	SRCS
 		DShot.cpp