scsi: ppa: Fix accidentally reversed conditions for 16-bit and 32-bit EPP

The conditions were correct in the ppa_in() function but not in the
ppa_out() function.

Fixes: 68a4f84a

 ("scsi: ppa: Add a module parameter for the transfer mode")
Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Link: https://lore.kernel.org/r/20230831051945.515476-1-alexhenrie24@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>