scsi: ufs-qcom: dump additional testbus registers

Change testbus default config, dump additional testbus registers along
with other debug vendor specific registers. These additional info are
useful in debugging link related failures.

Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>