uboot-mediatek: mt7986: support PSTORE/ramoops

Assign reserved memory for PSTORE/ramoops for the MT7986 SoC.

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

package/boot/uboot-mediatek/patches/051-mt7986-enable-pstore.patch

@@ -0,0 +1,38 @@
+--- a/arch/arm/dts/mt7986.dtsi
++++ b/arch/arm/dts/mt7986.dtsi
+@@ -46,6 +46,35 @@
+ 		};
+ 	};
+ 
++	psci {
++		compatible  = "arm,psci-0.2";
++		method      = "smc";
++	};
++
++	reserved-memory {
++		#address-cells = <2>;
++		#size-cells = <2>;
++		ranges;
++
++		/* 64 KiB reserved for ramoops/pstore */
++		ramoops@42ff0000 {
++			compatible = "ramoops";
++			reg = <0 0x42ff0000 0 0x10000>;
++			record-size = <0x1000>;
++		};
++
++		/* 192 KiB reserved for ARM Trusted Firmware (BL31) */
++		secmon_reserved: secmon@43000000 {
++			reg = <0 0x43000000 0 0x30000>;
++			no-map;
++		};
++
++		wmcpu_emi: wmcpu-reserved@4fc00000 {
++			no-map;
++			reg = <0 0x4fc00000 0 0x00100000>;
++		};
++	};
++
+ 	dummy_clk: dummy12m {
+ 		compatible = "fixed-clock";
+ 		clock-frequency = <12000000>;