ARM: dts: keystone: add cell's information to i2c nodes

I2C nodes should always have #address-cells and #size-cells defined,
otherwise warnings will be produced in case of adding child
nodes to the I2C bus in DT:
Warning (avoid_default_addr_size): Relying on default #address-cells value for /soc/i2c@2530800/pca@20
Warning (avoid_default_addr_size): Relying on default #size-cells value for /soc/i2c@2530800/pca@20

Hence, ensure that all i2cX nodes have #address-cells and #size-cells
properties defined.
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

arch/arm/boot/dts/keystone.dtsi

@@ -113,6 +113,8 @@ i2c1: i2c@2530400 {
 			clock-frequency = <100000>;
 			clocks = <&clki2c>;
 			interrupts = <GIC_SPI 286 IRQ_TYPE_EDGE_RISING>;
+			#address-cells = <1>;
+			#size-cells = <0>;
 		};
 
 		i2c2: i2c@2530800 {
@@ -121,6 +123,8 @@ i2c2: i2c@2530800 {
 			clock-frequency = <100000>;
 			clocks = <&clki2c>;
 			interrupts = <GIC_SPI 289 IRQ_TYPE_EDGE_RISING>;
+			#address-cells = <1>;
+			#size-cells = <0>;
 		};
 
 		spi0: spi@21000400 {