scsi: 53c700: Remove redundant assignment to pointer SCp

Pointer SCp is being re-assigned the same value that it was initialized to
a few lines earlier, the assignment is redundant and can be removed.

Link: https://lore.kernel.org/r/20220123175530.110462-1-colin.i.king@gmail.com


Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>