qemu: process: Improve documentation of values handled by qemuProcessHandleAcpiOstInfo

We forgot to document the specific fields for the 0x103 and 0x200
sources which are tied to device removal and device hotplug
respectively.

The value description is based on the ACPI 6.2A standard Table 6-207 and
Table 6-208. At the time of writing of this patch the standard can be
accessed e.g. at:

https://www.uefi.org/sites/default/files/resources/ACPI%206_2_A_Sept29.pdfSigned-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_process.c

@@ -1344,14 +1344,36 @@ qemuProcessHandleDeviceDeleted(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
  *     0x01: non-specific failure
  *     0x02: unrecognized notify code
  *     0x03 - 0x7f: reserved
- *     other values are specific to the notification type
+ *     other values are specific to the notification type (see below)
  *
- *   for the 0x100 source the following additional codes are standardized
+ *   for the 0x100 source the following additional codes are standardized:
  *     0x80: OS Shutdown request denied
  *     0x81: OS Shutdown in progress
  *     0x82: OS Shutdown completed
  *     0x83: OS Graceful shutdown not supported
- *     other values are reserved
+ *     other higher values are reserved
+ *
+ *  for the 0x003 (Ejection request) and 0x103 (Ejection processing) source
+ *  the following additional codes are standardized:
+ *     0x80: Device ejection not supported by OSPM
+ *     0x81: Device in use by application
+ *     0x82: Device Busy
+ *     0x83: Ejection dependency is busy or not supported for ejection by OSPM
+ *     0x84: Ejection is in progress (pending)
+ *     other higher values are reserved
+ *
+ *  for the 0x200 source the following additional codes are standardized:
+ *     0x80: Device insertion in progress (pending)
+ *     0x81: Device driver load failure
+ *     0x82: Device insertion not supported by OSPM
+ *     0x83-0x8F: Reserved
+ *     0x90-0x9F: Insertion failure - Resources Unavailable as described by the
+ *                                    following bit encodings:
+ *                                    Bit [3]: Bus or Segment Numbers
+ *                                    Bit [2]: Interrupts
+ *                                    Bit [1]: I/O
+ *                                    Bit [0]: Memory
+ *     other higher values are reserved
  *
  * Other fields and semantics are specific to the qemu handling of the event.
  *  - @alias may be NULL for successful unplug operations