PCI: keystone: Make explicitly non-modular

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

  drivers/pci/host/Kconfig:config PCI_KEYSTONE
  drivers/pci/host/Kconfig:       bool "TI Keystone 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.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-By: Murali Karicheri <m-karicheri2@ti.com>

drivers/pci/host/pci-keystone.c

@@ -17,7 +17,7 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/irqdomain.h>
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/msi.h>
 #include <linux/of_irq.h>
 #include <linux/of.h>
@@ -360,7 +360,6 @@ static const struct of_device_id ks_pcie_of_match[] = {
 	},
 	{ },
 };
-MODULE_DEVICE_TABLE(of, ks_pcie_of_match);
 
 static int __exit ks_pcie_remove(struct platform_device *pdev)
 {
@@ -439,9 +438,4 @@ static struct platform_driver ks_pcie_driver __refdata = {
 		.of_match_table = of_match_ptr(ks_pcie_of_match),
 	},
 };
-
-module_platform_driver(ks_pcie_driver);
-
-MODULE_AUTHOR("Murali Karicheri <m-karicheri2@ti.com>");
-MODULE_DESCRIPTION("Keystone PCIe host controller driver");
-MODULE_LICENSE("GPL v2");
+builtin_platform_driver(ks_pcie_driver);