ARM: dts: BCM5301X: Extend RAM to full 256MB for Linksys EA6500 V2

Linksys ea6500-v2 have 256MB of ram. Currently we only use 128MB.
Expand the definition to use all the available RAM.

Fixes: 03e9664 ("ARM: dts: BCM5301X: Add basic DT for Linksys EA6500 V2")
Signed-off-by: Aleksey Nasibulin <alealexpro100@ya.ru>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org
Acked-by: Rafał Miłecki <rafal@milecki.pl>
Link: https://lore.kernel.org/r/20230712014017.28123-1-ansuelsmth@gmail.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

Author: alealexpro100

arch/arm/boot/dts/broadcom/bcm4708-linksys-ea6500-v2.dts

@@ -19,7 +19,8 @@
 
 	memory@0 {
 		device_type = "memory";
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000>,
+		      <0x88000000 0x08000000>;
 	};
 
 	gpio-keys {