scsi: ufs: Avoid re-sending UFS link startup command

As part of UFS initialization and resume, we are already
resetting host and UFS device (RESET_N) before we issue
link startup command. So we need not explicitly re-send
the link startup again and avoid logging this expected
error we get in 2nd link startup attempt (DME.LINKLOST.ind).
This change removes logic to send link startup again while
link is already up.

Change-Id: I3d62b3f9e16cf88aaba39f33998e115e69daa136
Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>