iommu/io-pgtable-arm-v7s: Add cfg as a param in some macros

Add "cfg" as a parameter for some macros. This is a preparing patch for
mediatek extend the lvl1 pgtable. No functional change.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Link: https://lore.kernel.org/r/20210111111914.22211-13-yong.wu@mediatek.com
Signed-off-by: Will Deacon <will@kernel.org>