PNP_X.H

The public symbol file NTKRPAMP.PDB for the original release of Windows 10 tells that the kernel is built with the PNP_X.H header at

d:\th\minkernel\ntos\inc

and draws from it the following type definitions:

Line Number	Type	WDM.H	NTDDK.H	NTOSP.H
377	enum _DEVICE_WAKE_DEPTH	32158		30802
1286	enum _ARBITER_ACTION		10924	31711
1299	struct _ARBITER_CONFLICT_INFO		10937	31724
1321	struct _ARBITER_TEST_ALLOCATION_PARAMETERS		10959	31746
1342	struct _ARBITER_RETEST_ALLOCATION_PARAMETERS		10980	31767
1362	struct _ARBITER_BOOT_ALLOCATION_PARAMETERS		11000	31787
1372	struct _ARBITER_QUERY_ALLOCATED_RESOURCES_PARAMETERS		11010	31797
1381	struct _ARBITER_QUERY_CONFLICT_PARAMETERS		11019	31806
1405	struct _ARBITER_QUERY_ARBITRATE_PARAMETERS		11043	31830
1415	struct _ARBITER_ADD_RESERVED_PARAMETERS		11053	31840
1426	struct _ARBITER_PARAMETERS		11064	31851
1428	unnamed union for Parameters in _ARBITER_PARAMETERS		11068	31853
1442	enum _ARBITER_REQUEST_SOURCE		11080	31867
1454	enum _ARBITER_RESULT		11092	31879
1502	struct _ARBITER_LIST_ENTRY		11140	31927
1589	struct _ARBITER_INTERFACE		11227	32014

The header PNP_X.H is not known in any Device Driver Kit (DDK) or Windows Driver Kit (WDK).