msm: iommu: Clean newly-allocated page tables
msm: iommu: Clean newly-allocated page tables

If L2 redirection is disabled, clean page tables upon
allocation to prevent hardware table walks into unmapped
areas from accessing stale data.

Change-Id: If1e70bfa52f86d9ddc5a001a699050667b075631
Signed-off-by: Stepan Moskovchenko <4b3f23b045e38e54cffd83d34440316666b35af9@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas