LinuxKPI: add general module_driver(), use it for module_pci_driver()

Factor out module_pci_driver() from 366d68f into a general
module_driver() so other bus attachments can also use the same kind
of macro without duplicating all the lines.

Redefine module_pci_driver() using the new general macro.

No functional changes intended.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Reviewed by:	manu
Differential Revision: https://reviews.freebsd.org/D46467

sys/compat/linuxkpi/common/include/linux/device/driver.h

@@ -0,0 +1,33 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2021 Bjoern A. Zeeb
+ * Copyright (c) 2024 The FreeBSD Foundation
+ *
+ * Portions of this software were developed by Björn Zeeb
+ * under sponsorship from the FreeBSD Foundation.
+ */
+
+#ifndef	LINUXKPI_LINUX_DEVICE_DRIVER_H
+#define	LINUXKPI_LINUX_DEVICE_DRIVER_H
+
+#include <sys/cdefs.h>
+#include <linux/module.h>
+
+#define	module_driver(_drv, _regf, _unregf)					\
+static inline int								\
+__CONCAT(__CONCAT(_, _drv), _init)(void)					\
+{										\
+	return (_regf(&(_drv)));		 				\
+}										\
+										\
+static inline void								\
+__CONCAT(__CONCAT(_, _drv), _exit)(void)					\
+{										\
+	_unregf(&(_drv));							\
+}										\
+										\
+module_init(__CONCAT(__CONCAT(_, _drv), _init));				\
+module_exit(__CONCAT(__CONCAT(_, _drv), _exit))
+
+#endif	/* LINUXKPI_LINUX_DEVICE_DRIVER_H */

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

@@ -36,6 +36,7 @@
 #define	CONFIG_PCI_MSI
 
 #include <linux/types.h>
+#include <linux/device/driver.h>
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -274,24 +275,8 @@ extern spinlock_t pci_lock;
 
 #define	__devexit_p(x)	x
 
-#define module_pci_driver(_driver)					\
-									\
-static inline int							\
-_pci_init(void)								\
-{									\
-									\
-	return (linux_pci_register_driver(&_driver));			\
-}									\
-									\
-static inline void							\
-_pci_exit(void)								\
-{									\
-									\
-	linux_pci_unregister_driver(&_driver);				\
-}									\
-									\
-module_init(_pci_init);							\
-module_exit(_pci_exit)
+#define	module_pci_driver(_drv)						\
+    module_driver(_drv, linux_pci_register_driver, linux_pci_unregister_driver)
 
 struct msi_msg {
 	uint32_t			data;