drivers: i3c: Handle Hotjoin completion

When Hotjoin complete and dynamic address is assigned to target,
INTR_DYN_ADDR_ASSGN_STAT interrupt will be triggered, we can use sem_hj
to notify dw_i3c_target_ibi_raise_hj() about Hotjoin completion

Signed-off-by: Nghia Phung <nghiap@amperecomputing.com>