PLR_MAILBOX_INTERFACE
plr_write(regval, plr_die, PLR_MAILBOX_INTERFACE);
ret = readq_poll_timeout(plr_die->base + PLR_MAILBOX_INTERFACE, regval,
plr_write(regval, plr_die, PLR_MAILBOX_INTERFACE);
return readq_poll_timeout(plr_die->base + PLR_MAILBOX_INTERFACE, regval,