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
[subhashj@codeaurora.org: resolved trivial merge conflicts]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>