ufs: scsi: print the UIC or FATAL errors context

When UFS host controller encounters UIC or other FATAL errors,
driver is printing out the register dumps without any context
information (like why is this dump printed?) which makes hard
to judge the source of this dumps. This patch adds one header
message before register dumps so context is better known for
debugging.

Change-Id: I85a6d4e951bc4932464b6b7cbebce4e511c0cf5e
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>