firewire: fw-sbp2: remove unused misleading macro

SBP2_MAX_SECTORS is nowhere used in fw-sbp2.
It merely got copied over from sbp2 where it played a role in the past.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

drivers/firewire/fw-sbp2.c

@@ -151,9 +151,7 @@ struct sbp2_target {
 };
 
 #define SBP2_MAX_SG_ELEMENT_LENGTH	0xf000
-#define SBP2_MAX_SECTORS		255	/* Max sectors supported */
 #define SBP2_ORB_TIMEOUT		2000	/* Timeout in ms */
-
 #define SBP2_ORB_NULL			0x80000000
 
 #define SBP2_DIRECTION_TO_MEDIA		0x0