uavcan: Increase uavcan main stack size

I observed stack overflows when executing `uavcan params list`, so the
stack size probably needs to be increased.

Signed-off-by: Alex Mikhalev <alexmikhalevalex@gmail.com>

src/drivers/uavcan/CMakeLists.txt

@@ -113,6 +113,7 @@ add_custom_target(px4_uavcan_dsdlc DEPENDS px4_uavcan_dsdlc_run.stamp)
 px4_add_module(
 	MODULE drivers__uavcan
 	MAIN uavcan
+	STACK_MAIN 4096
 	INCLUDES
 		${DSDLC_OUTPUT}
 		${LIBUAVCAN_DIR}/libuavcan/include