FEC: Use defined constant instead of magic number

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Ben Warren <biggerbadderben@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>

drivers/net/fec_mxc.c

@@ -712,7 +712,7 @@ static int fec_probe(bd_t *bd)
 
 	/* Reset chip. */
 	writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_RESET, &fec->eth->ecntrl);
-	while (readl(&fec->eth->ecntrl) & 1)
+	while (readl(&fec->eth->ecntrl) & FEC_ECNTRL_RESET)
 		udelay(10);
 
 	/*