[PATCH] fix sector_div use in scsicam.c

sector_div has the same slightly strange calling convention do_div has:
it's return value is the modulo of the two operators, the division
result is in the first parameter.  Also optimize one of the expensive
64bit division away (okay, okay - it's not exactly an fast-path :))

drivers/scsi/scsicam.c

@@ -80,11 +80,13 @@ int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip)
 	if (ret || ip[0] > 255 || ip[1] > 63) {
 		ip[0] = 64;
 		ip[1] = 32;
-		if (sector_div(capacity, ip[0] * ip[1]) > 65534) {
+		sector_div(capacity, ip[0] * ip[1]);
+		if (capacity > 65534) {
 			ip[0] = 255;
 			ip[1] = 63;
+			sector_div(capacity, ip[0] * ip[1]);
 		}
-		ip[2] = sector_div(capacity, ip[0] * ip[1]);
+		ip[2] = capacity;
 	}
 
 	return 0;