Revert "ANDROID: iommu/arm-smmu: Allow inherting stream mapping from bootloader"

This reverts Change-Id: Ibb3784360a4424f7dc7c64a241811642aa0de7f4
(commit 7e24cc89 in android-mainline-tracking).

Recently, the commit 792c2bf3 ("FROMGIT: iommu/arm-smmu:
Don't bypass pinned stream mappings") was reverted from
android-mainline, due to alternative solutions eventually
landing upstream.

However, that change resolved an issue with another patch that ended
up getting an alternative solution. So reverting it broke the db845c
from booting.

Thus this patch reverts the prior patch as well, so that we are
aligned with upstream and properly boot.

Cc: Todd Kjos <tkjos@google.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: 5b9e3e32 ("Revert "FROMGIT: iommu/arm-smmu: Don't bypass pinned stream mappings"")
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I5316d492f22ac797fba6748dd47e4d475e372c86