sunhme: Uninitialized variable in happy_meal_init()

The "burst" string is only initialized for CONFIG_SPARC.  It should be
set to "64" because that's what is used by PCI.

Fixes: 24cddbc3 ("sunhme: Combine continued messages")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NSean Anderson <seanga2@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/sun/sunhme.c

@@ -1328,7 +1328,7 @@ static int happy_meal_init(struct happy_meal *hp)
 	void __iomem *erxregs      = hp->erxregs;
 	void __iomem *bregs        = hp->bigmacregs;
 	void __iomem *tregs        = hp->tcvregs;
-	const char *bursts;
+	const char *bursts = "64";
 	u32 regtmp, rxcfg;
 
 	/* If auto-negotiation timer is running, kill it. */