ramips: minew g1-c: Allow dynamic RAM sizes

Allow RAM size to be passed thru U-Boot. There are 128MB and 64MB
versions of Minew G1-C. This is also in line with the behaviour of
most other RAMIPS boards.

Signed-off-by: Bruno Randolf <[email protected]>

target/linux/ramips/dts/mt7628an_minew_g1-c.dts

@@ -16,11 +16,6 @@
 		led-upgrade = &led_system;
 	};
 
-	memory@0 {
-		device_type = "memory";
-		reg = <0x0 0x8000000>;
-	};
-
 	keys {
 		compatible = "gpio-keys-polled";
 		poll-interval = <20>;