Fix lockscreen rotation

CM made it so that the option was removed if a device sets
config_enableLockScreenRotation to false.
However that bool is defined false on fw_base, which leads to it being
always removed.

So we remove this unnecessary check.

Change-Id: I28b66fc70a9d32275a467349f1301d7d136708a8
	Merge remote-tracking branch 'upstream/kk' into kk