imx6: add gpr2 usb_otg_id iomux select control define

add IOMUXC_GPR1_USB_OTG_ID_OFFSET and IOMUXC_GPR1_USB_OTG_ID_SEL_MASK
define for the USB_OTG_ID_SEL bit.

Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h
index cc746b8..59b17db 100644
--- a/arch/arm/include/asm/arch-mx6/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx6/imx-regs.h
@@ -348,6 +348,8 @@
 /* GPR1 bitfields */
 #define IOMUXC_GPR1_ENET_CLK_SEL_OFFSET		21
 #define IOMUXC_GPR1_ENET_CLK_SEL_MASK		(1 << IOMUXC_GPR1_ENET_CLK_SEL_OFFSET)
+#define IOMUXC_GPR1_USB_OTG_ID_OFFSET		13
+#define IOMUXC_GPR1_USB_OTG_ID_SEL_MASK		(1 << IOMUXC_GPR1_USB_OTG_ID_OFFSET)
 
 /* GPR3 bitfields */
 #define IOMUXC_GPR3_GPU_DBG_OFFSET		29