ARM: Orion: Add arch support needed for I2C via DT.

The MV64XXX I2C driver needs a clock in order to calculate the baud
rate factors. So add an clk to the clk tree. Also add the base DT
properties for kirkwood devices.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>

Conflicts:
	arch/arm/mach-kirkwood/common.c
diff --git a/arch/arm/plat-orion/common.c b/arch/arm/plat-orion/common.c
index c179378..d245a87 100644
--- a/arch/arm/plat-orion/common.c
+++ b/arch/arm/plat-orion/common.c
@@ -47,6 +47,7 @@
 	orion_clkdev_add(NULL, MV643XX_ETH_NAME ".2", tclk);
 	orion_clkdev_add(NULL, MV643XX_ETH_NAME ".3", tclk);
 	orion_clkdev_add(NULL, "orion_wdt", tclk);
+	orion_clkdev_add(NULL, MV64XXX_I2C_CTLR_NAME ".0", tclk);
 }
 
 /* Fill in the resources structure and link it into the platform