msm_serial_hs: remove BAM debug code in tx timeout

The register dump in this function call provides
the debug information required and this call is redundant.

CRs-Fixed: 753441
Change-Id: Ieaa937e7d5c8a484c45d5c251272166414ba65ee
Signed-off-by: Naveen Kaje <nkaje@codeaurora.org>