ANDROID: GKI: Enable CONFIG_IOMMU_IO_PGTABLE_ARMV7S

To enable IOMMU driver, we need to enable CONFIG_IOMMU_IO_PGTABLE_ARMV7S
as build-in by default value in gki_defconfig.

Bug: 189076024
Bug: 299677454

Signed-off-by: Guangming Cao <Guangming.Cao@mediatek.com>
(cherry picked from commit b6cab5d1)
(cherry picked from commit 384f4652)
(cherry picked from https://android-review.googlesource.com/q/commit:f6090aae9656c0de4c27d987c81e23794e0d5ac9)
(cherry picked from https://android-review.googlesource.com/q/commit:f627c35dd5a13fb5024a0cbadb0ca6419a273fb2)
Merged-In: Ia9a87682c2c56338f57703a4bc01793fbe1a3496
Change-Id: Ia9a87682c2c56338f57703a4bc01793fbe1a3496