UPSTREAM: scsi: ufs: crypto: Remove ufs_hba_variant_ops::program_key

There are no longer any implementations of
ufs_hba_variant_ops::program_key, so remove it.

As a result, ufshcd_program_key() no longer can return an error, so also
clean it up to return void.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20241213041958.202565-5-ebiggers@kernel.org


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

(cherry picked from commit 409f2101)
Bug: 160883801
Change-Id: I2d9c1bb8db24af69c34b9b6f9b9b8c8b8af54711
Signed-off-by: Eric Biggers <ebiggers@google.com>