LinuxKPI: Add some header pollution and dummy headers

required by recent drm-kmod to be succesfully compiled.

Sponsored by:	Serenity Cyber Security, LLC
Reviewed by:	manu, bz
Obtained from:	OpenBSD (partially)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D42798

(cherry picked from commit 1bce29bcf121c1e16205fabb100f798d88f757c1)

sys/compat/linuxkpi/common/include/linux/irqdomain.h

@@ -0,0 +1,10 @@
+/* Public domain. */
+
+#ifndef _LINUXKPI_LINUX_IRQDOMAIN_H
+#define	_LINUXKPI_LINUX_IRQDOMAIN_H
+
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/radix-tree.h>
+
+#endif

sys/compat/linuxkpi/common/include/linux/kobject.h

@@ -35,6 +35,9 @@
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
 
 struct kobject;
 struct sysctl_oid;

sys/compat/linuxkpi/common/include/linux/of.h

@@ -0,0 +1,33 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2023 Serenity Cyber Security, LLC.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _LINUXKPI_LINUX_OF_H
+#define	_LINUXKPI_LINUX_OF_H
+
+#include <linux/kobject.h>
+
+#endif

sys/compat/linuxkpi/common/include/linux/shmem_fs.h

@@ -29,7 +29,10 @@
 #ifndef	_LINUXKPI_LINUX_SHMEM_FS_H_
 #define	_LINUXKPI_LINUX_SHMEM_FS_H_
 
+#include <linux/file.h>
+#include <linux/mempolicy.h>
 #include <linux/pagemap.h>
+#include <linux/swap.h>
 
 /* Shared memory support */
 struct page *linux_shmem_read_mapping_page_gfp(vm_object_t obj, int pindex,