smb-lib: clear EXIT_SNK_BASED_ON_CC BIT after cable removal

EXIT_SNK_BASED_ON_CC bit is only to be used while we are in hard
reset. There is a possibility for that bit to remain set if
cable were removed while a hard reset was in progress.

Clear that bit in removal path

Change-Id: I5e0776de9322a8015f851312df51a202e35c7a78
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>