t10-pi: provide empty t10_pi_complete() for !CONFIG_BLK_DEV_INTEGRITY

Fixes a link failure whtn BLK_DEV_INTEGRITY isn't defined.

Fixes: 10c41ddd ("block: move dif_prepare/dif_complete functions to block layer")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

include/linux/t10-pi.h

@@ -51,8 +51,19 @@ extern const struct blk_integrity_profile t10_pi_type1_crc;
 extern const struct blk_integrity_profile t10_pi_type1_ip;
 extern const struct blk_integrity_profile t10_pi_type3_crc;
 extern const struct blk_integrity_profile t10_pi_type3_ip;
+
+#ifdef CONFIG_BLK_DEV_INTEGRITY
 extern void t10_pi_prepare(struct request *rq, u8 protection_type);
 extern void t10_pi_complete(struct request *rq, u8 protection_type,
 			    unsigned int intervals);
+#else
+static inline void t10_pi_complete(struct request *rq, u8 protection_type,
+				   unsigned int intervals)
+{
+}
+static inline void t10_pi_prepare(struct request *rq, u8 protection_type)
+{
+}
+#endif
 
 #endif