video: fbdev: msm: resolve warning error from compiler

As compiler optimization level updated as optimiize for
performance, compliation will fail even if there is warning.

Change-Id: I7cb54c337649027aac4739fbe02a5d8c4c880267
Signed-off-by: Ganesh Keethol <gkeethol@codeaurora.org>
Signed-off-by: Chandrasekhar Mattaparthy <cmatta@codeaurora.org>