msm: kgsl: Add per process GPU memory usage trace

This patch adds support to trace per process utilization of the GPU
mapped memory. Additionally track the overall gpu memory usage which
includes process allocations, imported dma bufs and kgsl globals.

Change-Id: Icfee373efc7e84efe90cf20486ae6583eaa4f697
Signed-off-by: Sharat Masetty <smasetty@codeaurora.org>
Signed-off-by: Mohammed Mirza Mandayappurath Manzoor <mmandaya@codeaurora.org>
Signed-off-by: Neeraja P <neerp@codeaurora.org>