net: tsec: Fix memory leak in error path

tsec_initialize allocates a private driver structure using malloc.
Should the memory allocation of this private structure fail, the
function execution is aborted with a return 0, but the previously
allocated device structure is never freed, hence leaked.

Free the device structure in the error case.
Signed-off-by: NMario Six <mario.six@gdsys.cc>
Acked-by: NJoe Hershberger <joe.hershberger@ni.com>

drivers/net/tsec.c

@@ -701,8 +701,10 @@ static int tsec_initialize(bd_t *bis, struct tsec_info_struct *tsec_info)
 
 	priv = (struct tsec_private *)malloc(sizeof(*priv));
 
-	if (!priv)
+	if (!priv) {
+		free(dev);
 		return 0;
+	}
 
 	priv->regs = tsec_info->regs;
 	priv->phyregs_sgmii = tsec_info->miiregs_sgmii;