msm: kgsl: Modify kgsl_mmu_pagefault ftrace event format

The kgsl_mmu_pagefault event is the only ftrace event with
it's format field being multiline. All other ftrace events
in the kernel have the format field in a single line.
Make the kgsl_mmu_pagefault event format consistent with
all other ftrace events.

Change-Id: I99ab00f6319ae13a6f99a31bc11511d05835b50c
Signed-off-by: Pushkar Joshi <pushkarj@codeaurora.org>