msm: msm_fb: remove mmio access through mmap

Disable access to mm io and add
appropriate range checks to ensure valid accesses
through framebuffer mmap. This prevents illegal
access into memory.

CRs-Fixed: 474706
Change-Id: If25166f2732433ef967e99c716440030b567aae9
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>
(cherry picked from commit b571bef36cf51f9bb4cd1ad3ba23e3cee6d1d3cb)

Conflicts:

	drivers/video/msm/msm_fb.c

Signed-off-by: Raviteja <adimur@codeaurora.org>
msm: kgsl: Detect and avoid malformed ioctl codes

Because we were using _IO_NR, one could construct a malformed ioctl
code that would avoid allocating memory yet go to a function that
expected that memory. Still use _IO_NR to index the array of ioctls,
but check that the full values match before jumping to the helper
function.

CRs-fixed: 385592
Change-Id: Ic0dedbaded469035bd0a2bb0f20fecb2a3045ca5
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>