msm: kgsl: Print process name on pagefault

This helps in debugging. For example, with stall on
fault, the gpu fault message may have a different pid
than reported in the gpu page fault message. So the
name of the process helps in correlating the page fault
with the gpu fault messages.

Change-Id: I7706bf6e6a9be5e1e68128709071c6ac68a16974
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>