msm: mhi: Check ERRDBG registers for device status

Add support to check RDDM cookie in ERRDBG1,ERRDBG2 and ERRDBG3
registers to debug the the bootup failure when device
failed to enter MISSION mode.

Change-Id: Idaf00c082ffda97805e958ae083a331d9f0909e9
Signed-off-by: Vivek Pernamitta <vpernami@codeaurora.org>
Signed-off-by: Ramya SR <rsr@codeaurora.org>