scsi: ufs: fix suspend/resume tracing message

Tracing message for suspend/resume events is wrongly printing the device
state as link state and link state as device state. This change fixes the
same and while we are here, fix the device and link state string to be more
readable.

Change-Id: Ifc878b84345bf4f7be56102d4972cbac039b78ed
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>