[Armbian build PR] - odroidhc4: bump to u-boot v2024.04; drop most defconfig patches in favor of hooks

odroidhc4: bump to u-boot v2024.04; drop most defconfig patches in favor of hooks

• odroidhc4: bump to u-boot v2024.04; drop most defconfig patches in favor of hooks
  • add pre_config_uboot_target hook for switching BOOTCONFIG across the two targets
    • adapt UBOOT_TARGET_MAP to not call the defconfig Makefile targets directly, instead, just do a variable assignment (ignored by Make)
    • otherwise, when using the defconfig directly in the UBOOT_TARGET_MAP, the post_config_uboot_target .config changes are overwritten when Make is called
  • only patch left is boot usb-nvme-scsi/sata first (still done in meson64.h)
  • remove FIP handling from family file meson-sm1.conf into board file hook where it belongs
  • u-boot: enable more compression methods, EFI debugging, i2c, leds, tcp networking
  • use flashcp for mtd writing
  • Unchanged:
    • confirmed as of v2024.04: using the C4 (not HC4) defconfig is still needed to be able to write to mtd when booted from SD
    • also confirmed: one still needs to erase Petitboot using Petitboot, then boot from SD, to be able to flash mainline u-boot to mtd

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