msm:pm-8x60: Do not generate access flag faults for the kernel mappings

The pgd mapping (msm_pm_pc_pgd) generates Access flag fault whenever
this entry is read into the TLB for the first time. Add this flag to
the pgd mapping such that when the fault occurs, software resets the
Access flag to 1 in the translation table entry that caused the fault.
This prevents the fault from occurring the next time that memory
location is accessed.

Change-Id: I8d2ecc4d4005955ddeeaf3953ca1c445163b694c
Signed-off-by: Archana Sathyakumar <asathyak@codeaurora.org>