ARM: dts: aspeed-g4: fix AHB window size of the SMC controllers

The window of the Aspeed AST2400 SMC Controllers to map chips on the
AHB Bus has a 256MB size. The full window range is

    [ 0x20000000 - 0x2FFFFFFF ] for the FMC controller
    [ 0x30000000 - 0x3FFFFFFF ] for the SPI controller

This change requires CONFIG_VMSPLIT_2G to be set.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-g4.dtsi

@@ -26,7 +26,7 @@ ahb {
 
 		fmc: flash-controller@1e620000 {
 			reg = < 0x1e620000 0x94
-				0x20000000 0x02000000 >;
+				0x20000000 0x10000000 >;
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "aspeed,ast2400-fmc";
@@ -41,7 +41,7 @@ flash@0 {
 
 		spi: flash-controller@1e630000 {
 			reg = < 0x1e630000 0x18
-				0x30000000 0x02000000 >;
+				0x30000000 0x10000000 >;
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "aspeed,ast2400-spi";