staging: rts5139: Replaced min() with min_t() in

This patch replaces min() with min_t() in rts51x_scsi.c

Signed-off-by: Archana kumari <archanakumari959@gmail.com>
Reviewed-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>