dm: event: add EVT_DM_POST_INIT_R event type

dm: event: add EVT_DM_POST_INIT_R event type

This patch introduces EVT_DM_POST_INIT_R event type for handling hooks
after relocation.

Fixes: 55171aedda88 ("dm: Emit the arch_cpu_init_dm() even only before relocation")
Suggested-by: Simon Glass <[email protected]>
Cc: Bin Meng <[email protected]>
Signed-off-by: Chanho Park <[email protected]>
Tested-by: Milan P. Stanić <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Tested-by: Roland Ruckerbauer <[email protected]>
Tested-by: Roland Ruckerbauer <[email protected]>
Fixed missing event name in event.c:
Signed-off-by: Simon Glass <[email protected]>