arm: mvebu: switch clearfog to use device-tree i2c and gpio

This switches the clearfog boards to use DM based gpio and i2c
drivers.  The io expanders are configured via their device-tree
entries.

Signed-off-by: Jon Nettleton <jon@solid-run.com>
[baruch: add DT i2c aliases]
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/dts/armada-388-clearfog.dts b/arch/arm/dts/armada-388-clearfog.dts
index bc52bc0..a0b566a 100644
--- a/arch/arm/dts/armada-388-clearfog.dts
+++ b/arch/arm/dts/armada-388-clearfog.dts
@@ -62,6 +62,8 @@
 		ethernet2 = &eth1;
 		ethernet3 = &eth2;
 		spi1 = &spi1;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
 	};
 
 	chosen {