usb/ehci: Add USB support for the MX6Q

Currently, only USB Host 1 is supported.

Cc: Remy Bohmer <linux@bohmer.net>
Signed-off-by: Wolfgang Grandegger <wg@denx.de>
diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h
index 636458f..613809b 100644
--- a/arch/arm/include/asm/arch-mx6/clock.h
+++ b/arch/arm/include/asm/arch-mx6/clock.h
@@ -46,5 +46,6 @@
 u32 imx_get_uartclk(void);
 u32 imx_get_fecclk(void);
 unsigned int mxc_get_clock(enum mxc_clock clk);
+void enable_usboh3_clk(unsigned char enable);
 
 #endif /* __ASM_ARCH_CLOCK_H */