msm: sde: Remove panic from rotator smmu fault handler

During SMMU fault for SDE rotator, it should return to SMMU driver after
collecting dump data, so that SMMU driver can generate proper analysis
info for the fault.

CRs-Fixed: 2007472
Change-Id: I59b7b12e53524e40811f1237e4366b23a4933561
Signed-off-by: Benjamin Chan <bkchan@codeaurora.org>