scsi: ufs-qcom: avoid sleep in atomic context

Minimize the number of debug registers printed in atomic context
during error and also avoid sleeping in atomic context.

Change-Id: Ic5f3260c433e2d99d3a87a80dae0106dc622c4b7
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
[cang@codeaurora.org: resolved trivial merge conflicts]
Signed-off-by: Can Guo <cang@codeaurora.org>