Merge improvements from kernel HID parser to the userland usbhid(3)
parser. This merge does not change any API and should not break any
native or thirdparty applications.
Changes include:
* Merge multiple report ID support and other improvements from kernel
HID parser.
* Ignore rid argument in hid_start_parser, parse all the report items since
we now support multiple report ID.
* Skip report ID byte in hid_get_data() and set report ID byte in
hid_set_data(), if report ID is non-zero.
* Reimplement hid_get_report_id: instead get report id from uhid device
(which is always 0), try parsing the report descriptor and return the
first report ID encountered.
MFC r207812
hid_get_data() now expects that the hid data passed in always contains
the report ID byte. Thus we should not skip the the report ID byte in
hid_interrupt(). Also, if HUP_KEYBOARD usage is an array, do not try
to modify the 'data' pointer, instead, increase the hid_item_t field
'pos' by 'report_size' before calling hid_get_data() during each
iteration.