Code cleanup: fix old style assignment ambiguities like "=-" etc.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/evb64260/eth.c b/board/evb64260/eth.c
index 618af6f..fa5b6d4 100644
--- a/board/evb64260/eth.c
+++ b/board/evb64260/eth.c
@@ -163,7 +163,7 @@
 	int eth_len=0;
 	char *eth_data;
 
-	eth0_rx_desc_single *rx=&p->eth_rx_desc[(p->rdn)];
+	eth0_rx_desc_single *rx = &p->eth_rx_desc[(p->rdn)];
 
 	INVALIDATE_DCACHE((unsigned int)rx,(unsigned int)(rx+1));
 
@@ -252,7 +252,7 @@
 #ifdef DEBUG
 	unsigned int old_command_stat,old_psr;
 #endif
-	eth0_tx_desc_single *tx=&dev->eth_tx_desc[dev->tdn];
+	eth0_tx_desc_single *tx = &dev->eth_tx_desc[dev->tdn];
 
 	/* wait for tx to be ready */
 	INVALIDATE_DCACHE((unsigned int)tx,(unsigned int)(tx+1));