scsi: lpfc: avoid an unused function warning

The only reference to lpfc_nvmet_replenish_context() is inside of an
disabled:

drivers/scsi/lpfc/lpfc_nvmet.c:1457:1: error: 'lpfc_nvmet_replenish_context' defined but not used [-Werror=unused-function]

This replaces the preprocessor conditional with a C condition, so the
compiler can see that the function is intentionally unused.

Fixes: 9a38e4f1c82f ("scsi: lpfc: Fix MRQ > 1 context list handling")
Signed-off-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/lpfc/lpfc_nvmet.c

···
 			    struct rqb_dmabuf *nvmebuf,
 			    uint64_t isr_timestamp)
 {
-#if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 	struct lpfc_nvmet_rcv_ctx *ctxp;
 	struct lpfc_nvmet_tgtport *tgtp;
 	struct fc_frame_header *fc_hdr;
···
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 	uint32_t id;
 #endif
+
+	if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+		return;
 
 	ctx_buf = NULL;
 	if (!nvmebuf || !phba->targetport) {
···
 
 	if (nvmebuf)
 		lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
-#endif
 }
 
 /**