PCI: xgene: Make explicitly non-modular

This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_XGENE
  drivers/pci/host/Kconfig:       bool "X-Gene PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Tanmay Inamdar <tinamdar@apm.com>

drivers/pci/host/pci-xgene.c

@@ -21,7 +21,7 @@
 #include <linux/io.h>
 #include <linux/jiffies.h>
 #include <linux/memblock.h>
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
@@ -569,8 +569,4 @@ static struct platform_driver xgene_pcie_driver = {
 	},
 	.probe = xgene_pcie_probe_bridge,
 };
-module_platform_driver(xgene_pcie_driver);
-
-MODULE_AUTHOR("Tanmay Inamdar <tinamdar@apm.com>");
-MODULE_DESCRIPTION("APM X-Gene PCIe driver");
-MODULE_LICENSE("GPL v2");
+builtin_platform_driver(xgene_pcie_driver);