HV: add API to change vuart base & irq config

1. add an API to support vuart COM base and irq configured;
2. add the HV cmd to be parsed for vuart COM base & irq.

Tracked-On: #2170
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/release/vuart.c

@@ -20,3 +20,5 @@ bool hv_used_dbg_intx(__unused uint8_t intx_pin)
 {
 	return false;
 }
+
+void vuart_set_property(__unused const char *vuart_info) {}