scsi: ufs: retry if the link-startup fails

In some cases, due to hardware timing issues the Uni-Pro link-startup
might fail. The UFS HCI recovery procedure contradicts the Uni-Pro
sequence. The UFS HCI specifies to resend DME_LINKSTARTUP command
after IS.ULLS (link-lost interrupt) is received. The Uni-Pro specifies
that if link-startup fails the link is in "down" state. The link-lost is
indicated to the DME user only when the link is up. Hence, the UFS HCI
recovery procedure of waiting for IS.ULLS and retrying link-startup may
not work properly.

In order to resolve the ambiguity, reset the host controller to make
sure the link is in down state and retry the link-startup.

Change-Id: I6b2c97d341a6b4e78c1d6245fe9bd32db26a2a89
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>