i2c: add Amlogic Meson driver

Add a driver for the I2C controller available on Amlogic Meson SoCs.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/arch/arm/include/asm/arch-meson/i2c.h b/arch/arm/include/asm/arch-meson/i2c.h
new file mode 100644
index 0000000..783bc37
--- /dev/null
+++ b/arch/arm/include/asm/arch-meson/i2c.h
@@ -0,0 +1,11 @@
+/*
+ * Copyright 2017 - Beniamino Galvani <b.galvani@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#ifndef _MESON_I2C_H_
+#define _MESON_I2C_H_
+
+#define MESON_I2C_CLK_RATE	167000000
+
+#endif