boot/edk2: drop dependency on tf-a for macchiatobin

When building a firmware for the MACCHIATObin with edk2 and
arm-trusted-firmware, the build can randomly fail with the
following make error:

    make[1]: Circular output/build/edk2-edk2-stable202411/.stamp_configured <- arm-trusted-firmware dependency dropped.

The message appears also when the build is not failing, depending on
the number of parallel jobs and the build order.

The issue can be observed with the following commands:

    cat >.config <<EOF
    BR2_aarch64=y
    BR2_TOOLCHAIN_EXTERNAL=y
    BR2_TARGET_ARM_TRUSTED_FIRMWARE=y
    BR2_TARGET_ARM_TRUSTED_FIRMWARE_PLATFORM="a80x0_mcbin"
    BR2_TARGET_ARM_TRUSTED_FIRMWARE_EDK2_AS_BL33=y
    BR2_TARGET_BINARIES_MARVELL=y
    BR2_TARGET_EDK2=y
    BR2_TARGET_EDK2_PLATFORM_SOLIDRUN_ARMADA80X0MCBIN=y
    BR2_TARGET_MV_DDR_MARVELL=y
    EOF
    make olddefconfig
    utils/brmake
    grep -FC5 'dependency dropped' br.log

The circular dependency happen due to [1] and [2].

In fact, only TF-A depends on EDK II (passed as BL33) for building and
not vice versa. See [3]. The EDK II "SolidRun MacchiatoBin" platform
build does not need any TF-A image, compared to some other platforms
such as "Socionext DeveloperBox" or "QEMU SBSA" which are referencing
TF-A images in a hook added in EDK2_PRE_BUILD_HOOKS.

Drop the false dependency on TF-A to fix the build.

This issue has been present since the EDK2 introduction in commit [4].

[1] https://gitlab.com/buildroot.org/buildroot/-/blob/2025.02/boot/arm-trusted-firmware/arm-trusted-firmware.mk#L121
[2] https://gitlab.com/buildroot.org/buildroot/-/blob/2025.02/boot/edk2/edk2.mk#L118
[3] https://github.com/Semihalf/edk2-platforms/wiki/Build_firmware
[4] https://gitlab.com/buildroot.org/buildroot/-/commit/1074a37e783b023bd0491ba4f4f7acab7f289e1d

Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>
Cc: Dick Olsson <hi@senzilla.io>
[Julien: add extra info in commit log]
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 7361a155ef420a58ebe1f8f360b141a926b6d8b2)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>

boot/edk2/edk2.mk

@@ -115,7 +115,7 @@ endef
 
 else ifeq ($(BR2_TARGET_EDK2_PLATFORM_SOLIDRUN_ARMADA80X0MCBIN),y)
 EDK2_ARCH = AARCH64
-EDK2_DEPENDENCIES += host-dtc arm-trusted-firmware edk2-non-osi
+EDK2_DEPENDENCIES += host-dtc edk2-non-osi
 EDK2_PACKAGE_NAME = Platform/SolidRun/Armada80x0McBin
 EDK2_PLATFORM_NAME = Armada80x0McBin
 EDK2_BUILD_DIR = $(EDK2_PLATFORM_NAME)-$(EDK2_ARCH)