iommu/exynos: Don't read version register on every tlb operation
iommu/exynos: Don't read version register on every tlb operation

This patch removes reading of REG_MMU_VERSION register on every tlb
operation and caches SYSMMU version in driver's internal data.

Signed-off-by: Marek Szyprowski <2a0259761cc3e88db42be5300c1579a67c77e65e@samsung.com>
Tested-by: Javier Martinez Canillas <039000e09e601bba70626bd0fbe59654c9cf8cac@collabora.co.uk>
Signed-off-by: Joerg Roedel <61aff96566804ea1da8a65de5bcc892ce07caceb@suse.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs