msm: ipa: Fix SMEM mapping to AP CB

When Q6 SMEM memory is mapped to AP CB only partial range is
mapped as a result when IPA tries to access beyond mapped
range it results in an SMMU S1 fault. Make changes to map
the full SMEM region.

Change-Id: I81d5d7b27635a97bb50115ddb3a6b2d56e753c2e
Signed-off-by: Chaitanya Pratapa <cpratapa@codeaurora.org>