Revert "ARM: 7931/1: Correct virt_addr_valid"

This reverts commit fe2635214ffafa3e29e6d150d0526efbbedaca4c.
Revert "ARM: mm: use phys_addr_t appropriately in p2v and v2p conversions"

This reverts commit 9fe7f54dad696a8c4ed5707476910d7bc7fca285.
Merge branch 'xb' of https://github.com/xboxfanj/kernel_msm into xb