mac80211: add backport of the module_pci_driver macro

That is required by various PCI drivers.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31438 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mac80211/patches/301-add-module_pci_driver-to-compat-3.4.patch

@@ -0,0 +1,21 @@
+--- a/include/linux/compat-3.4.h
++++ b/include/linux/compat-3.4.h
+@@ -62,6 +62,18 @@ static inline void eth_hw_addr_random(st
+ #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)) */
+ #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,12)) */
+
++/**
++ * module_pci_driver() - Helper macro for registering a PCI driver
++ * @__pci_driver: pci_driver struct
++ *
++ * Helper macro for PCI drivers which do not do anything special in module
++ * init/exit. This eliminates a lot of boilerplate. Each module may only
++ * use this macro once, and calling it replaces module_init() and module_exit()
++ */
++#define module_pci_driver(__pci_driver) \
++	module_driver(__pci_driver, pci_register_driver, \
++		      pci_unregister_driver)
++
+ #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0)) */
+
+ #endif /* LINUX_5_4_COMPAT_H */