scsi: ufs: ufs-exynos: Simplify drv_data retrieval

The compatible field of exynos_ufs_drv_data is not necessary because
of_device_id already has it. Thus, we don't need it anymore and we can get
drv_data by device_get_match_data.

Link: https://lore.kernel.org/r/20211018124216.153072-5-chanho61.park@samsung.com


Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>