MPC8xx: fix "Remove volatile from net API" aftermath

Commit db288a9 "net: Remove volatile from net API" caused a number of
build warnings:
fec.c: In function 'fec_initialize':
fec.c:183:13: warning: assignment from incompatible pointer type [enabled by default]
fec.c: In function 'fec_recv':
fec.c:284:5: warning: passing argument 1 of 'NetReceive' discards 'volatile' qualifier from pointer target type [enabled by default]
/home/wd/git/u-boot/work/include/net.h:433:13: note: expected 'uchar *' but argument is of type 'volatile uchar *'
scc.c: In function 'scc_initialize':
scc.c:85:14: warning: assignment from incompatible pointer type [enabled by default]

Fix these.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>

arch/powerpc/cpu/mpc8xx/fec.c

@@ -139,7 +139,7 @@ typedef volatile struct CommonBufferDescriptor {
 
 static RTXBD *rtx = NULL;
 
-static int fec_send(struct eth_device* dev, volatile void *packet, int length);
+static int fec_send(struct eth_device *dev, void *packet, int length);
 static int fec_recv(struct eth_device* dev);
 static int fec_init(struct eth_device* dev, bd_t * bd);
 static void fec_halt(struct eth_device* dev);
@@ -193,7 +193,7 @@ int fec_initialize(bd_t *bis)
 	return 1;
 }
 
-static int fec_send(struct eth_device* dev, volatile void *packet, int length)
+static int fec_send(struct eth_device *dev, void *packet, int length)
 {
 	int j, rc;
 	struct ether_fcc_info_s *efis = dev->priv;
@@ -267,7 +267,7 @@ static int fec_recv (struct eth_device *dev)
 				rtx->rxbd[rxIdx].cbd_sc);
 #endif
 		} else {
-			volatile uchar *rx = NetRxPackets[rxIdx];
+			uchar *rx = NetRxPackets[rxIdx];
 
 			length -= 4;
 

arch/powerpc/cpu/mpc8xx/scc.c

@@ -65,7 +65,7 @@ typedef volatile struct CommonBufferDescriptor {
 
 static RTXBD *rtx;
 
-static int scc_send(struct eth_device* dev, volatile void *packet, int length);
+static int scc_send(struct eth_device *dev, void *packet, int length);
 static int scc_recv(struct eth_device* dev);
 static int scc_init (struct eth_device* dev, bd_t * bd);
 static void scc_halt(struct eth_device* dev);
@@ -90,7 +90,7 @@ int scc_initialize(bd_t *bis)
 	return 1;
 }
 
-static int scc_send(struct eth_device* dev, volatile void *packet, int length)
+static int scc_send(struct eth_device *dev, void *packet, int length)
 {
 	int i, j=0;
 #if 0