bnx2x: Change bnx2x_tests_str_arr to static char

This patch changes the definition of bnx2x_tests_str_arr from char to static
char. This correction will also eliminate the sparse warning created in commit
cf2c1df62e065bfc15e38daf2d3479a56b320f29.

Signed-off-by: Merav Sicron <meravs@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c

@@ -1600,7 +1600,7 @@ static int bnx2x_set_pauseparam(struct net_device *dev,
 	return 0;
 }
 
-char *bnx2x_tests_str_arr[BNX2X_NUM_TESTS_SF] = {
+static char *bnx2x_tests_str_arr[BNX2X_NUM_TESTS_SF] = {
 	"register_test (offline)    ",
 	"memory_test (offline)      ",
 	"int_loopback_test (offline)",