platform: msm: qcom-geni-se: Don't hold mutex during register dump

When dumping out registers as part of error handling code from various
protocol drivers don't hold a mutex lock as these could be called from
atomic context. The mutex lock protects against the bus votes being
removed while the registers are being printed, but since this method is
used during active transfers, the resource vote should be in.

Change-Id: I6c82c0278de902dee4bdd9c7b3b908c5c6f5e899
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>