msm_fb: display: disable pan display and memory access to fb1 and fb2

The native fb1 and fb2 framebuffer memory is not used and not
allocated on the board file. So on the driver side, pan display ioctl
or other operations on fb1 or fb2 framebuffer memory is checked and
invalidated.

CRs-fixed: 357242
Change-Id: I2883926251a0465f69f18c442d5867556a4651bf
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>