PCI: controller: Add missing MODULE_DESCRIPTION() macros

When ARCH=x86, make allmodconfig && make W=1 C=1 reports:

WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/dwc/pci-exynos.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pci-host-generic.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-altera.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-altera-msi.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-mediatek.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-mediatek-gen3.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/vmd.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-apple.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-mt7621.o

Add the missing MODULE_DESCRIPTION() macro.

[kwilczynski: update MODULE_DESCRIPTION() text, commit log]
Link: https://lore.kernel.org/linux-pci/[e-mail]
Signed-off-by: Jeff Johnson <[e-mail]>
Signed-off-by: Krzysztof Wilczyński <[e-mail]>
Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Acked-by: Nirmal Patel <[e-mail]>
Acked-by: Sergio Paracuellos <[e-mail]> # MT7621

drivers/pci/controller/dwc/pci-exynos.c

···
 	},
 };
 module_platform_driver(exynos_pcie_driver);
+MODULE_DESCRIPTION("Samsung Exynos PCIe host controller driver");
 MODULE_LICENSE("GPL v2");
 MODULE_DEVICE_TABLE(of, exynos_pcie_of_match);

drivers/pci/controller/pci-host-common.c

···
 }
 EXPORT_SYMBOL_GPL(pci_host_common_remove);
 
+MODULE_DESCRIPTION("Generic PCI host common driver");
 MODULE_LICENSE("GPL v2");

drivers/pci/controller/pci-host-generic.c

···
 };
 module_platform_driver(gen_pci_driver);
 
+MODULE_DESCRIPTION("Generic PCI host controller driver");
 MODULE_LICENSE("GPL v2");

drivers/pci/controller/pcie-altera-msi.c

···
 subsys_initcall(altera_msi_init);
 MODULE_DEVICE_TABLE(of, altera_msi_of_match);
 module_exit(altera_msi_exit);
+MODULE_DESCRIPTION("Altera PCIe MSI support driver");
 MODULE_LICENSE("GPL v2");

drivers/pci/controller/pcie-altera.c

···
 
 MODULE_DEVICE_TABLE(of, altera_pcie_of_match);
 module_platform_driver(altera_pcie_driver);
+MODULE_DESCRIPTION("Altera PCIe host controller driver");
 MODULE_LICENSE("GPL v2");

drivers/pci/controller/pcie-apple.c

···
 };
 module_platform_driver(apple_pcie_driver);
 
+MODULE_DESCRIPTION("Apple PCIe host bridge driver");
 MODULE_LICENSE("GPL v2");

drivers/pci/controller/pcie-mediatek-gen3.c

···
 };
 
 module_platform_driver(mtk_pcie_driver);
+MODULE_DESCRIPTION("MediaTek Gen3 PCIe host controller driver");
 MODULE_LICENSE("GPL v2");

drivers/pci/controller/pcie-mediatek.c

···
 	},
 };
 module_platform_driver(mtk_pcie_driver);
+MODULE_DESCRIPTION("MediaTek PCIe host controller driver");
 MODULE_LICENSE("GPL v2");

drivers/pci/controller/pcie-mt7621.c

···
 };
 builtin_platform_driver(mt7621_pcie_driver);
 
+MODULE_DESCRIPTION("MediaTek MT7621 PCIe host controller driver");
 MODULE_LICENSE("GPL v2");

drivers/pci/controller/vmd.c

···
 module_pci_driver(vmd_drv);
 
 MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Volume Management Device driver");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION("0.6");