USB: EXYNOS: Set USB 2.0 HOST Link mode

This patch adds a function to set usb host mode to USB 2.0 HOST Link
for EXYNOS5

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
diff --git a/arch/arm/include/asm/arch-exynos/system.h b/arch/arm/include/asm/arch-exynos/system.h
index c1d880f..42e1d21 100644
--- a/arch/arm/include/asm/arch-exynos/system.h
+++ b/arch/arm/include/asm/arch-exynos/system.h
@@ -49,6 +49,9 @@
 };
 #endif
 
+#define USB20_PHY_CFG_HOST_LINK_EN	(1 << 0)
+
+void set_usbhost_mode(unsigned int mode);
 void set_system_display_ctrl(void);
 
 #endif	/* _EXYNOS4_SYSTEM_H */