scsi: ufs: host: ufs-exynos: Use already existing definition

UFS core already uses RX_MIN_ACTIVATETIME_CAPABILITY macro, let's use the
same in driver as well instead of having a different macro name for the
same offset.

Link: https://lore.kernel.org/r/20220615121204.16642-2-alim.akhtar@samsung.com


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