ENGR00171622 - FEC : workaround for Gb enet in sabrelite board.

Micrel phy KSZ9021 Gb speed cannot work well in i.MX6 sabrelite
board. Advertise phy is not 1000Base-T capable, and  enet can
work well at 100Mbps mode in 1000M environment(1G cable & 1G hub).

Signed-off-by: Fugang Duan <B38611@freescale.com>

board/freescale/mx6q_sabrelite/mx6q_sabrelite.c

 /*
- * Copyright (C) 2011 Freescale Semiconductor, Inc.
+ * Copyright (C) 2011-2012 Freescale Semiconductor, Inc.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -657,8 +657,8 @@ int mx6_rgmii_rework(char *devname, int phy_addr)
 	phy_write(devname, phy_addr, 0x9, 0x0c00);
 #endif
 
-	/* enable master mode, 1000 Base-T capable */
-	phy_write(devname, phy_addr, 0x9, 0x1f00);
+	/* enable master mode, force phy to 100Mbps */
+	phy_write(devname, phy_addr, 0x9, 0x1c00);
 
 	/* min rx data delay */
 	phy_write(devname, phy_addr, 0x0b, 0x8105);