uboot-mediatek: remove '0x' prefix from pstore node

Remove '0x' prefix from pstore node in dts, just like it was done
for the device tree used by Linux on MT7622.
This change is done in preparation to update U-Boot to 2022.04.

Signed-off-by: Daniel Golle <[email protected]>

package/boot/uboot-mediatek/patches/050-mt7622-enable-pstore.patch

@@ -15,7 +15,7 @@
 +		ranges;
 +
 +		/* 64 KiB reserved for ramoops/pstore */
-+		ramoops@0x42ff0000 {
++		ramoops@42ff0000 {
 +			compatible = "ramoops";
 +			reg = <0 0x42ff0000 0 0x10000>;
 +			record-size = <0x1000>;