usb: chipidea: otg: enable HNP polling support for gadget and host

Enable HNP polling support for chipidea gadget and allocate memory
for host request flag when otg fsm init.

Acked-by: Peter Chen <[e-mail]>
Signed-off-by: Li Jun <[e-mail]>
Signed-off-by: Felipe Balbi <[e-mail]>

drivers/usb/chipidea/otg_fsm.c

···
 	ci->fsm.id = hw_read_otgsc(ci, OTGSC_ID) ? 1 : 0;
 	ci->fsm.otg->state = OTG_STATE_UNDEFINED;
 	ci->fsm.ops = &ci_otg_ops;
+	ci->gadget.hnp_polling_support = 1;
+	ci->fsm.host_req_flag = devm_kzalloc(ci->dev, 1, GFP_KERNEL);
+	if (!ci->fsm.host_req_flag)
+		return -ENOMEM;
 
 	mutex_init(&ci->fsm.lock);