PCI: rpaphp: Add MODULE_DESCRIPTION

This patch adds a brief MODULE_DESCRIPTION to rpadlpar_io kernel modules
(descriptions taken from Kconfig file).
Signed-off-by: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200924051343.16052.9571.stgit@localhost.localdomain

drivers/pci/hotplug/rpadlpar_core.c

@@ -478,3 +478,4 @@ static void __exit rpadlpar_io_exit(void)
 module_init(rpadlpar_io_init);
 module_exit(rpadlpar_io_exit);
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("RPA Dynamic Logical Partitioning driver for I/O slots");