Remove size optimization for individual modules

It makes more sense to set the optimization flags on a platform basis
instead of individually for each module. This allows for different
optimization options for SITL, NuttX, Snapdragon, etc.

src/drivers/stm32/CMakeLists.txt

@@ -33,7 +33,6 @@
 px4_add_module(
 	MODULE drivers__stm32
 	COMPILE_FLAGS
-		-Os
 	SRCS
 		drv_hrt.c
 		drv_io_timer.c
@@ -43,4 +42,4 @@ px4_add_module(
 	DEPENDS
 		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix : 
+# vim: set noet ft=cmake fenc=utf-8 ff=unix :

src/drivers/stm32/adc/CMakeLists.txt

@@ -34,10 +34,9 @@ px4_add_module(
 	MODULE drivers__stm32__adc
 	MAIN adc
 	COMPILE_FLAGS
-		-Os
 	SRCS
 		adc.cpp
 	DEPENDS
 		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix : 
+# vim: set noet ft=cmake fenc=utf-8 ff=unix :

src/drivers/stm32/tone_alarm/CMakeLists.txt

@@ -34,10 +34,9 @@ px4_add_module(
 	MODULE drivers__stm32__tone_alarm
 	MAIN tone_alarm
 	COMPILE_FLAGS
-		-Os
 	SRCS
 		tone_alarm.cpp
 	DEPENDS
 		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix : 
+# vim: set noet ft=cmake fenc=utf-8 ff=unix :