BACKPORT: arm64: tlb: Adjust stride and type of TLBI according to mmu_gather

Now that the core mmu_gather code keeps track of both the levels of page
table cleared and also whether or not these entries correspond to
intermediate entries, we can use this in our tlb_flush() callback to
reduce the number of invalidations we issue as well as their scope.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Change-Id: Ibe3adb99f9f7b64517c614fd08cf3fa5c034c7ee
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
[cyberknight777: Backport to msm-4.14]
Signed-off-by: Cyber Knight <cyberknight755@gmail.com>