Reduce ROMFS footprint
Reduce too chatty content, de-allocate non-needed string buffers
fix variable name in rc.uavcan
rename PWM_OUTPUTS to PWM_OUT in all files
rename DO_AUTOCONFIG to AUTOCNF in all files
Merge remote-tracking branch 'upstream/master' into romfs_clean

Conflicts:
	ROMFS/px4fmu_common/init.d/rc.interface
	ROMFS/px4fmu_common/init.d/rcS
Merge pull request #1461 from PX4/romfs_clean

Romfs clean