arm: mach-msm: fix integer overflow in DFE_IOCTL_COMMAND

Added error checks for upper limit of param.num in
DFE_IOCTL_COMMAND

Change-Id: I0143813d38ec7a5dfa7a8307b075daf7d4a4d101
Acked-by: John Nicholas <jnichola@qti.qualcomm.com>
Signed-off-by: Venkatesh Yadav Abbarapu <quicvenkat@codeaurora.org>
Merge "arm: mach-msm: fix integer overflow in DFE_IOCTL_COMMAND" into du44