configs: libretech-cc_defconfig: enable EFI Capsule on Disk

configs: libretech-cc_defconfig: enable EFI Capsule on Disk

Everything is in place to allow this board to support EFI Capsule updates.
Enable everything needed to support Capsule updates, as well as Capsule
on Disk. All this allows updating U-Boot on eMMC directly from linux using
fwupd. Also enable DFU_MMC, which is a requirement for EFI Capsule flashing
to eMMC/SD to work.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Ferass El Hafidi <funderscore@postmarketos.org>
Link: https://patch.msgid.link/20260422-b4-amlogic-sysreset-capsules-v3-4-07b5ccc8f552@postmarketos.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>