soc: qcom: glink_pkt: Modify conversion of CTS/DTR signals

SMD_DTR_SIG and SMD_CTS_SIG signals are converted to TIOCM_DTR
and TIOCM_RTS respectively, for client notification. This is
incorrect conversion.

SMD_DTR_SIG and SMD_CTS_SIG signals conversion is modified to
TIOCM_DSR and TIOCM_CTS respectively.

CRs-Fixed: 2148119
Change-Id: I7cd61afe4639fc7c5fd993f4047fad3ff04c53a7
Signed-off-by: Dhoat Harpal <hdhoat@codeaurora.org>