iommu: arm-smmu: dump additional smmu registers in fault handler

In order to ease debugging the context fault, dump additional smmu
registers in context fault handler.

example output:
arm-smmu 15000000.apps-smmu: FAR    = 0x0000000000001000
arm-smmu 15000000.apps-smmu: PAR    = 0x0000000000000000
arm-smmu 15000000.apps-smmu: FSR    = 0x00000402 [TF R ]
arm-smmu 15000000.apps-smmu: TTBR0  = 0x0000000000000000
arm-smmu 15000000.apps-smmu: TTBR1  = 0x0000000000000000
arm-smmu 15000000.apps-smmu: SCTLR  = 0x00c00027 ACTLR  = 0x00000003
arm-smmu 15000000.apps-smmu: CBAR  = 0x0001f300
arm-smmu 15000000.apps-smmu: MAIR0   = 0xf404ff44 MAIR1   = 0x000000e4

Change-Id: I7f0a41551ac4b8bb02f951930f16325c7b8d7635
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>