Drop override of dram_init_banksize() weak function for mt7987. This is
effectively the same as the default implementation, so we do not need
to override it.

Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Tested-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260319-mtk-init-fix-dram-v1-1-6171ec141f40@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

Consolidate all mem_map definitions for MediaTek ARMv8 platforms into a
single file. The size of the DDR and MMIO regions can vary, so Kconfig
options are added to configure them by target.

Signed-off-by: David Lechner <dlechner@baylibre.com>

This patch adds basic support for MediaTek MT7987 SoC.
This includes files that will initialize the SoC after boot and
its device tree.

In order to maximize the continuous usable  memory space, MT7987 has its
ATF BL31 loaded at the top of RAM. Since u-boot will also locate itself to
top of RAM, u-boot will read the actual memory region of BL31 and set
correct gd->ram_top to avoid u-boot overlapping with BL31.

As now support for mt7987 hasn't been submitted to linux kernel, all dts
filed will be put to arch/arm/dts. They'll be removed after successfully
being merged by linux kernel, and OF_UPSTREAM will also be switched on.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>