scsi: Documentation: Fix typo in sysfs-driver-ufs

Remove repeated word: "the The amount"

Link: https://lore.kernel.org/r/20211006154804.135184-1-sohaib.amhmd@gmail.com
Signed-off-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>