uboot-mediatek: update to U-Boot v2025.10

uboot-mediatek: update to U-Boot v2025.10

The most relevant change is the removal of the empty board_init()
functions by u-boot/u-boot@70a4d1fa1dd, which makes many patches not
apply anymore and also requires most board defconfigs to be updated
by adding "# CONFIG_BOARD_INIT is not set" to them.

Also some config symbols have been renamed and downstream boards
had to be adapted accordingly:

u-boot/u-boot@0fd9a3480a0 ("env: Rename OVERWRITE_ETHADDR_ONCE to
                            ENV_OVERWRITE_ETHADDR_ONCE")

u-boot/u-boot@5fb88fa725d ("env: Rename SYS_REDUNDAND_ENVIRONMENT to
                            ENV_REDUNDANT")

u-boot/u-boot@123682c7651 ("env: Rename SYS_RELOC_GD_ENV_ADDR to
                            ENV_RELOC_GD_ENV_ADDR")

u-boot/u-boot@0f44d5549ed ("env: Rename SYS_MMC_ENV_DEV to
                            ENV_MMC_DEVICE_INDEX")

u-boot/u-boot@31617b880ab ("env: Rename SYS_MMC_ENV_PART to
                            ENV_MMC_EMMC_HW_PARTITION")

u-boot/u-boot@ffc4914703a ("env: Rename ENV_MMC_PARTITION to
                            ENV_MMC_SW_PARTITION")

u-boot/u-boot@fb5235239aa ("env: Rename DEFAULT_ENV_FILE to
                            ENV_DEFAULT_ENV_TEXT_FILE")

(also renamed USE_DEFAULT_ENV_FILE to USE_ENV_DEFAULT_ENV_TEXT_FILE)

Remove upstreamed patches:
 * 001-mtd-spinand-winbond-add-Winbond-W25N04KV-flash-suppo.patch
   u-boot/u-boot@fe37fb8214e

 * 002-mtd-spinand-gigadevice-sync-supported-chips-with-lin.patch
   u-boot/u-boot@506ceddffdc

 * 003-net-mediatek-correct-the-AN8855-TPID-value-in-port-i.patch
   u-boot/u-boot@70db2be9fba

 * 004-01-serial-mediatek-fix-register-names-and-offsets.patch
   u-boot/u-boot@6e15d3f91aa

 * 004-02-serial-mediatek-enable-baudrate-accuracy-compensatio.patch
   u-boot/u-boot@6952209ef22

 * 005-clk-mediatek-add-dummy-clk-enable-disable-ops-for-ap.patch
   u-boot/u-boot@1bf21212976

 * 006-env-Fix-possible-out-of-bound-access-in-env_do_env_s.patch
   u-boot/u-boot@0ffd456516b

 * 130-01-env-mtd-add-the-missing-put_mtd_device.patch
   u-boot/u-boot@39ae954b04e

 * 130-02-env-mtd-initialize-saved_buf-pointer.patch
   u-boot/u-boot@7e842bd3315

 * 170-cmd-bootmenu-permit-to-select-bootmenu-entry-with.patch
   u-boot/u-boot@8c986521c3c

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