bnx2x: Reuse bnx2x_null_format_ver()

Reuse bnx2x_null_format_ver() in functions where it's appropriated
instead of open coded variant.
Signed-off-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c

@@ -6161,14 +6161,20 @@ static void bnx2x_link_int_ack(struct link_params *params,
 	}
 }
 
+static int bnx2x_null_format_ver(u32 spirom_ver, u8 *str, u16 *len)
+{
+	str[0] = '\0';
+	(*len)--;
+	return 0;
+}
+
 static int bnx2x_format_ver(u32 num, u8 *str, u16 *len)
 {
 	u16 ret;
 
 	if (*len < 10) {
 		/* Need more than 10chars for this format */
-		*str = '\0';
-		(*len)--;
+		bnx2x_null_format_ver(num, str, len);
 		return -EINVAL;
 	}
 
@@ -6183,8 +6189,7 @@ static int bnx2x_3_seq_format_ver(u32 num, u8 *str, u16 *len)
 
 	if (*len < 10) {
 		/* Need more than 10chars for this format */
-		*str = '\0';
-		(*len)--;
+		bnx2x_null_format_ver(num, str, len);
 		return -EINVAL;
 	}
 
@@ -6193,13 +6198,6 @@ static int bnx2x_3_seq_format_ver(u32 num, u8 *str, u16 *len)
 	return 0;
 }
 
-static int bnx2x_null_format_ver(u32 spirom_ver, u8 *str, u16 *len)
-{
-	str[0] = '\0';
-	(*len)--;
-	return 0;
-}
-
 int bnx2x_get_ext_phy_fw_version(struct link_params *params, u8 *version,
 				 u16 len)
 {