9994 cxgbe t4nex: Handle get_fl_payload() alloc failures
9995 cxgbe t4_devo_attach() should initialize ->sfl

@@ -279,10 +279,11 @@
         uint32_t offset;        /* current packet within the larger buffer */
         uint16_t copy_threshold; /* anything this size or less is copied up */
 
         uint64_t copied_up;     /* # of frames copied into mblk and handed up */
         uint64_t passed_up;     /* # of frames wrapped in mblk and handed up */
+        uint64_t allocb_fail;   /* # of mblk allocation failures */
 
         TAILQ_ENTRY(sge_fl) link; /* All starving freelists */
 };
 
 /* txq: SGE egress queue + miscellaneous items */