bnxt_en: add a dummy definition for bnxt_vf_rep_get_fid()

When bnxt VF-reps are not compiled in (CONFIG_BNXT_SRIOV is off)
bnxt_tc.c needs a dummy definition of the routine bnxt_vf_rep_get_fid().

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Fixes: 2ae7408fedfe ("bnxt_en: bnxt: add TC flower filter offload support")
Signed-off-by: Sathya Perla <sathya.perla@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.h

@@ -80,5 +80,10 @@ static inline struct net_device *bnxt_get_vf_rep(struct bnxt *bp, u16 cfa_code)
 {
 	return NULL;
 }
+
+static inline u16 bnxt_vf_rep_get_fid(struct net_device *dev)
+{
+	return 0;
+}
 #endif /* CONFIG_BNXT_SRIOV */
 #endif /* BNXT_VFR_H */