cxgb4: make symbol pedits static

Fixes the following sparse warning:

drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c:46:27: warning:
 symbol 'pedits' was not declared. Should it be static?

Fixes: 27ece1f357b7 ("cxgb4: add tc flower support for ETH-DMAC rewrite")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c

@@ -43,7 +43,7 @@
 
 #define STATS_CHECK_PERIOD (HZ / 2)
 
-struct ch_tc_pedit_fields pedits[] = {
+static struct ch_tc_pedit_fields pedits[] = {
 	PEDIT_FIELDS(ETH_, DMAC_31_0, 4, dmac, 0),
 	PEDIT_FIELDS(ETH_, DMAC_47_32, 2, dmac, 4),
 	PEDIT_FIELDS(ETH_, SMAC_15_0, 2, smac, 0),