fbdev: msm: Xlog debug bus dump

Include support to dump debug bus registers
for sdm632, sdm439 and sdm429 from xlog
tout handler.

Change-Id: Ie3581b8ca8b19e6422271fddf8d29bb3ad5f8986
Signed-off-by: Animesh Kishore <animeshk@codeaurora.org>