msm: camera: smmu: Profile time taken for map, unmap

Add debugging capability to profile ion alloc,
smmu map and unmap calls. Enable below debugfs settings
to get the traces with corresponding latencies.
Alloc : echo 1 > /sys/kernel/debug/camera_memmgr/alloc_profile_enable
Map, Unmap : echo 1 > /sys/kernel/debug/camera_smmu/map_profile_enable
Capture the profiling numbers in traces.

CRs-Fixed: 2538876
Change-Id: I92dc58416a9febc77a7836b8f7b1523b547c128f
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>