powerpc/usb: Mention usb1 before usb2 inside default hwconfig string

For USB device-tree fix-up to work properly, its necessary to
mention USB1 options before that of USB2 inside default hwconfig
string
Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>

include/configs/corenet_ds.h

@@ -700,8 +700,8 @@
 #define	CONFIG_EXTRA_ENV_SETTINGS				\
 	"hwconfig=fsl_ddr:ctlr_intlv=cacheline,"		\
 	"bank_intlv=cs0_cs1;"					\
-	"usb2:dr_mode=peripheral,phy_type=" __stringify(__USB_PHY_TYPE) ";"\
-	"usb1:dr_mode=host,phy_type=" __stringify(__USB_PHY_TYPE) "\0"\
+	"usb1:dr_mode=host,phy_type=" __stringify(__USB_PHY_TYPE) ";"\
+	"usb2:dr_mode=peripheral,phy_type=" __stringify(__USB_PHY_TYPE) "\0"\
 	"netdev=eth0\0"						\
 	"uboot=" __stringify(CONFIG_UBOOTPATH) "\0"		\
 	"ubootaddr=" __stringify(CONFIG_SYS_TEXT_BASE) "\0"	\