arm-trusted-firmware-mediatek: update to new release 20250711

Update mediatek arm-trusted-firmware to the latest version.

Remove upstream patch:
  0004-mediatek-snfi-fix-return-code-when-reading.patch

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>

Author: DragonBluep

package/boot/arm-trusted-firmware-mediatek/Makefile

@@ -13,9 +13,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=https://github.com/mtk-openwrt/arm-trusted-firmware.git
-PKG_SOURCE_DATE:=2025-02-12
-PKG_SOURCE_VERSION:=e090770684e775711a624e68e0b28112227a4c38
-PKG_MIRROR_HASH:=1ff9d60f3677aadd9a6716e860985987ba7157bd28ce831112e05c0b3170939a
+PKG_SOURCE_DATE:=2025-07-11
+PKG_SOURCE_VERSION:=78a0dfd927bb00ce973a1f8eb4079df0f755887a
+PKG_MIRROR_HASH:=72a5f3f00f9e368226bb779dc098aac6195a312b48cc22172987d494ccd135d1
 
 PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>