The ixgbe driver does not compile if CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=n
because the macro has not the proper number of parameters. To reproduce
the issue:

  make config T=x86_64-native-linuxapp-gcc
  sed -i 's,CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=y,CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=n,' build/.config
  make -j4
  [...]
   ixgbe_rxtx_vec_sse.c: In function ‘_recv_raw_pkts_vec’:
   ixgbe_rxtx_vec_sse.c:345:53: error: macro "desc_to_olflags_v" passed 3 arguments, but takes just 2
      desc_to_olflags_v(descs, vlan_flags, &rx_pkts[pos]);
                                                        ^
   ixgbe_rxtx_vec_sse.c:345:3: error: ‘desc_to_olflags_v’ undeclared (first use in this function)
      desc_to_olflags_v(descs, vlan_flags, &rx_pkts[pos]);
      ^
   ixgbe_rxtx_vec_sse.c:345:3: note: each undeclared identifier is reported only once for each function it appears in
   ixgbe_rxtx_vec_sse.c:231:10: error: variable ‘vlan_flags’ set but not used [-Werror=unused-but-set-variable]
     uint8_t vlan_flags;
             ^
   cc1: all warnings being treated as errors

This patch fixes the number of arguments in th macro, and ensure that
vlan_flags is marked as used to avoid the third error.

Fixes: b37b528d957c ("mbuf: add new Rx flags for stripped VLAN")
Reported-by: Amin Tootoonchian <redacted>
Signed-off-by: Olivier Matz <redacted>
---
 drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
index 4f95deb..1c4fd7c 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c

@@ -197,7 +197,9 @@ desc_to_olflags_v(__m128i descs[4], uint8_t vlan_flags,
 	rx_pkts[3]->ol_flags = vol.e[3];
 }
 #else
-#define desc_to_olflags_v(desc, rx_pkts) do {} while (0)
+#define desc_to_olflags_v(desc, vlan_flags, rx_pkts) do { \
+		RTE_SET_USED(vlan_flags); \
+	} while (0)
 #endif
 
 /*

-- 
2.8.1