net: Kirkwood_egiga.c: fixed build warnings

This patch fixes following build warnings for kirkwood_egiga.c

kirkwood_egiga.c: In function "kwgbe_init":
kirkwood_egiga.c:448: warning: dereferencing type-punned pointer will break strict-aliasing rules
kirkwood_egiga.c: In function "kwgbe_recv":
kirkwood_egiga.c:609: warning: dereferencing type-punned pointer will break strict-aliasing rules

Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

drivers/net/kirkwood_egiga.c

@@ -445,7 +445,7 @@ static int kwgbe_init(struct eth_device *dev)
 	KWGBEREG_WR(regs->pmtu, 0);
 
 	/* Assignment of Rx CRDB of given RXUQ */
-	KWGBEREG_WR(regs->rxcdp[RXUQ].rxcdp, (u32) dkwgbe->p_rxdesc_curr);
+	KWGBEREG_WR(regs->rxcdp[RXUQ], (u32) dkwgbe->p_rxdesc_curr);
 	/* Enable port Rx. */
 	KWGBEREG_WR(regs->rqc, (1 << RXUQ));
 
@@ -606,7 +606,7 @@ static int kwgbe_recv(struct eth_device *dev)
 	p_rxdesc_curr->buf_size = PKTSIZE_ALIGN;
 	p_rxdesc_curr->byte_cnt = 0;
 
-	writel((unsigned)p_rxdesc_curr->nxtdesc_p, &dkwgbe->p_rxdesc_curr);
+	writel((unsigned)p_rxdesc_curr->nxtdesc_p, (u32) &dkwgbe->p_rxdesc_curr);
 
 	return 0;
 }

drivers/net/kirkwood_egiga.h

@@ -418,7 +418,7 @@ struct kwgbe_registers {
 	u32 pmtbs;
 	u8 pad14[0x60c - 0x4ec - 4];
 	struct kwgbe_rxcdp rxcdp[7];
-	u32 rxcdp7;
+	struct kwgbe_rxdesc *rxcdp7;
 	u32 rqc;
 	struct kwgbe_txdesc *tcsdp;
 	u8 pad15[0x6c0 - 0x684 - 4];