The call to mxman_suspend() returned an error if WLBT FW
is failed, this prevents platform suspend if the firmware
does not recover. Return success even though message is
dropped.
Change-Id: I8c293aaa69dc356ad8125d37f06321392894978c
SCSC-Bug-Id: SSB-50585 Signed-off-by: Ivan Priest <i.priest@samsung.com>