msm: vidc: return error in case of init failure

Return error if error comes in video driver
initialization.

Change-Id: I54c516808587fb7d94c3d517f8c72c6c9aa9d91d
CRs-fixed: 542535
Signed-off-by: Pushkaraj Patil <ppatil@codeaurora.org>
Fix various compiler warnings with gcc-4.7

Change-Id: Ia29ef35dc710721ec15d5e2cf849e027ae0e7724

Conflicts:
	drivers/input/touchscreen/mxts.c