Add a new EVT_RESERVE_BOARD event that is triggered immediately after
the reserve_board() initcall completes during pre-relocation init. This
allows board or application code to reserve additional memory before
other reservations (global_data, fdt, etc).
The event is placed after EVT_FSP_INIT_F in the event enumeration and
is triggered in board_f.c right after the reserve_board initcall.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>