msm: kgsl: Correctly deal with log wrapping in the profiler pipe

The profiler output pipe code assumes that 64 bit perfcounter values
in the input log are contiguous which is not true; the log can wrap
at any point in the entry. Read the hi/lo values as 32 bit integers
and construct the 64 bit value by hand.

Change-Id: Ic0dedbad5ec5d8708bdb7796fe64ef6886669cd5
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>