scsi: ufs: core: Do not exit ufshcd_err_handler() unless operational or dead

Callers of ufshcd_err_handler() expect it to return in an operational
state. However, the code does not check the state before exiting.

Add a check for the state and perform retries until either success or the
maximum number of retries is reached.

Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Avri Altman <[email protected]>
Signed-off-by: Adrian Hunter <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

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