msm_serial_hs: Enhancing IPC logs

Move required logs from DEBUG level to INFO level
and reduce the tx/rx data to be logged only first and
last 10 bytes in INFO level.

CRs-Fixed: 593862
Change-Id: I8e01ae77f7da3386fc77713b28443b19c0704eb0
Signed-off-by: Dilip Kota <c_dkota@codeaurora.org>