PCI: layerscape: Remove ls_pcie_establish_link()

ls_pcie_establish_link() does not do any real operation, except to wait for
the linkup establishment.  In fact, this is not necessary.  Moreover, each
PCIe controller not inserted device will increase the Linux startup time
about 200ms.

Remove ls_pcie_establish_link().
Signed-off-by: NMinghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

drivers/pci/host/pci-layerscape.c

@@ -11,7 +11,6 @@
  */
 
 #include <linux/kernel.h>
-#include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of_pci.h>
@@ -62,27 +61,12 @@ static int ls_pcie_link_up(struct pcie_port *pp)
 	return 1;
 }
 
-static int ls_pcie_establish_link(struct pcie_port *pp)
-{
-	unsigned int retries;
-
-	for (retries = 0; retries < 200; retries++) {
-		if (dw_pcie_link_up(pp))
-			return 0;
-		usleep_range(100, 1000);
-	}
-
-	dev_err(pp->dev, "phy link never came up\n");
-	return -EINVAL;
-}
-
 static void ls_pcie_host_init(struct pcie_port *pp)
 {
 	struct ls_pcie *pcie = to_ls_pcie(pp);
 	u32 val;
 
 	dw_pcie_setup_rc(pp);
-	ls_pcie_establish_link(pp);
 
 	/*
 	 * LS1021A Workaround for internal TKT228622