CBMEM: Change declarations for initialization hooks

There are efforts to have bootflows that do not follow a traditional
bootblock-romstage-postcar-ramstage model. As part of that CBMEM
initialisation hooks will need to move from romstage to bootblock.

The interface towards platforms and drivers will change to use one of
CBMEM_CREATION_HOOK() or CBMEM_READY_HOOK(). Former will only be called
in the first stage with CBMEM available.

Change-Id: Ie24bf4e818ca69f539196c3a814f3c52d4103d7e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63375
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
diff --git a/src/soc/intel/broadwell/pch/power_state.c b/src/soc/intel/broadwell/pch/power_state.c
index 12bee7d..b1ab622 100644
--- a/src/soc/intel/broadwell/pch/power_state.c
+++ b/src/soc/intel/broadwell/pch/power_state.c
@@ -30,7 +30,7 @@
 	}
 	memcpy(ps_cbmem, ps_car, sizeof(*ps_cbmem));
 }
-ROMSTAGE_CBMEM_INIT_HOOK(migrate_power_state)
+CBMEM_CREATION_HOOK(migrate_power_state);
 
 /* Return 0, 3, or 5 to indicate the previous sleep state. */
 static int prev_sleep_state(const struct chipset_power_state *ps)