feat(fvp): initialize LFA component activators in platform layer

Update the FVP platform's LFA component table to populate the
'activator' and 'activation_pending' by introducing fields
in plat_lfa_component_info_t.
- 'activator': function pointers for component-specific
               activation logic
- 'activation_pending': tracks whether the component's activation
                        is pending

Set the activator function pointers for supported components:
- BL31 via get_bl31_activator()
- RMM (if RME is enabled) via get_rmm_activator()

This allows the LFA service to invoke component-specific prime
and activate callbacks through platform-registered hooks.

Change-Id: Ifd997a8b8cab209c25aabb2e9d4eab59e909ea4d
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
2 files changed