Merge tag 'u-boot-stm32-20211213' of https://source.denx.de/u-boot/custodians/u-boot-stm

- enable KSZ90x1 PHY driver on DHCOR
- DHSOM boards:
  - increase USB power-good delay
  - add update_sf script to install U-Boot into SF
  - increase PHY auto-negotiation timeout to 20 seconds
  - fix SoM and board coding strap GPIO handling

# gpg verification failed.

arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi

@@ -19,6 +19,17 @@
 	};
 };
 
+
+&ethernet0 {
+	mdio0 {
+		ethernet-phy@7 {
+			reset-gpios = <&gpioz 2 GPIO_ACTIVE_LOW>;
+			reset-assert-us = <11000>;
+			reset-deassert-us = <1000>;
+		};
+	};
+};
+
 &sdmmc1 {
 	u-boot,dm-spl;
 };