riscv: dts: microchip: fix fabric i2c reg size

The size of the reg should've been changed when the address was changed,
but obviously I forgot to do so.

Fixes: ab291621a8 ("riscv: dts: microchip: icicle: re-jig fabric peripheral addresses")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi

@@ -16,7 +16,7 @@
 
 	i2c2: i2c@40000200 {
 		compatible = "microchip,corei2c-rtl-v7";
-		reg = <0x0 0x40000200 0x0 0x1000>;
+		reg = <0x0 0x40000200 0x0 0x100>;
 		#address-cells = <1>;
 		#size-cells = <0>;
 		clocks = <&fabric_clk3>;