ARM: dts: at91: sam9x60: Shrink SFR ioremap size

Don't waste memory and map just the registers that are defined.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>

Author: ambarus

arch/arm/boot/dts/sam9x60.dtsi

@@ -630,7 +630,7 @@
 
 			sfr: sfr@f8050000 {
 				compatible = "microchip,sam9x60-sfr", "syscon";
-				reg = <0xf8050000 0x4000>;
+				reg = <0xf8050000 0x100>;
 			};
 
 			matrix: matrix@ffffde00 {