WED requires a bunch of additional reserved memory regions. As U-Boot's
LMB allocator defaults to a maximum of only 8 regions, this currently
makes using WED impossible.
Raise LMB_MAX_REGIONS to 64 just like for all other MediaTek boards
with a SoC supporting WED.
Fixes: 572ea68070 ("uboot-mediatek: add patches for MT7988 and builds for RFB")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>