iommu/arm-smmu: fix s2cr and smr teardown on device detach from domain

When we attach a device to a domain, we configure the SMRs (if we have
any) to match the Stream IDs for the corresponding SMMU master and
program the s2crs accordingly. However, on detach we tear down the s2crs
assuming stream-indexing (as opposed to stream-matching) and SMRs
assuming they are present.

This patch fixes the device detach code so that it operates as a
converse of the attach code.

Change-Id: I4079e43069909e4b9008263b06186040d556c272
Signed-off-by: Will Deacon <will.deacon@arm.com>
Git-commit: 43b412bedb782e27a8771b61870dd45a24975266
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>