ARM: shmobile: only enable used I2C interfaces in DT on all Renesas boards

Currently all I2C interfaces in all *.dtsi files for various Renesas SoCs
are enabled by default. Switch them all off and only enable populated I2C
interfaces in board-specific *.dts files.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts b/arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts
index c638e4a..9fcffc1 100644
--- a/arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts
+++ b/arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts
@@ -52,6 +52,7 @@
 };
 
 &i2c0 {
+	status = "okay";
 	touchscreen: st1232@55 {
 		compatible = "sitronix,st1232";
 		reg = <0x55>;