ARM: shmobile: r8a7791: tidyup SDHI register size on DTSI

r8a7791 SDHI ch0/ch1 has SD_DMACR which is located in 0x324.
This patch updates register size
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7791.dtsi

@@ -482,7 +482,7 @@ mmcif0: mmc@ee200000 {
 
 	sdhi0: sd@ee100000 {
 		compatible = "renesas,sdhi-r8a7791";
-		reg = <0 0xee100000 0 0x200>;
+		reg = <0 0xee100000 0 0x328>;
 		interrupts = <0 165 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp3_clks R8A7791_CLK_SDHI0>;
 		dmas = <&dmac1 0xcd>, <&dmac1 0xce>;