uboot-mediatek: update Airoha EN8811H driver

Use the version sent to upstream U-Boot[1], which has much better
code quality and also works better (without packet loss).

The `en8811h_read_fw` func is adapted to use current read logic.

1. https://lore.kernel.org/u-boot/20250720122852.22563-1-lucienzx159@gmail.com/

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
Link: https://github.com/openwrt/openwrt/pull/20000
(cherry picked from commit b63a48b012)
Link: https://github.com/openwrt/openwrt/pull/20146
Signed-off-by: Robert Marko <robimarko@gmail.com>

package/boot/uboot-mediatek/patches/442-add-bpi-r3-mini.patch

@@ -503,7 +503,7 @@
 +		compatible = "ethernet-phy-id03a2.a411";
 +		reg = <14>;
 +
-+		airoha,rx-pol-reverse;
++		airoha,pnswap-rx;
 +
 +		reset-gpios = <&gpio 49 GPIO_ACTIVE_LOW>;
 +		reset-assert-us = <10000>;