msm: camera: Add support for compat mode in msm.c

Add compat ioctl support to msm.c driver so that 32bit
userspace binaries can make ioctl calls into it.

Change-Id: I9e6971499e749ff6ed7e332da61840abdc97044d
Signed-off-by: Seemanta Dutta <seemanta@codeaurora.org>