staging: most: net: make array 'broadcast' static, shrinks object size

Don't populate the array 'broadcast' on the stack but instead make it
static. Makes the object code smaller by 53 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  10511	   1521	    448	  12480	   30c0	drivers/staging/most/net/net.o

After:
   text	   data	    bss	    dec	    hex	filename
  10394	   1585	    448	  12427	   308b	drivers/staging/most/net/net.o

(gcc version 8.2.0 x86_64)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/most/net/net.c

@@ -75,7 +75,7 @@ static struct core_component comp;
 static int skb_to_mamac(const struct sk_buff *skb, struct mbo *mbo)
 {
 	u8 *buff = mbo->virt_address;
-	const u8 broadcast[] = { 0x03, 0xFF };
+	static const u8 broadcast[] = { 0x03, 0xFF };
 	const u8 *dest_addr = skb->data + 4;
 	const u8 *eth_type = skb->data + 12;
 	unsigned int payload_len = skb->len - ETH_HLEN;