[source] lantiq: drop obsolete patch

[LEDE Commits]

mkresin pushed a commit to source.git, branch master:
https://git.lede-project.org/c0e66478b520b07c33343161f722351f5f858990

commit c0e66478b520b07c33343161f722351f5f858990
Author: Mathias Kresin <dev at kresin.me>
AuthorDate: Tue Nov 29 06:10:35 2016 +0100

    lantiq: drop obsolete patch
    
    ifxhcd never had roothub support but since kernel 3.x it was expected
    that a roothub always exists.
    
    The patched fixed a null pointer deref in the usb subsystem because of
    the missing roothub.
    
    Since ifxhcd is gone, this whole patch isn't required any longer.
    
    Signed-off-by: Mathias Kresin <dev at kresin.me>
---
 .../0032-USB-fix-roothub-for-IFXHCD.patch          | 31 ----------------------
 1 file changed, 31 deletions(-)

diff --git a/target/linux/lantiq/patches-4.4/0032-USB-fix-roothub-for-IFXHCD.patch b/target/linux/lantiq/patches-4.4/0032-USB-fix-roothub-for-IFXHCD.patch
deleted file mode 100644
index a8bc2c1..0000000
--- a/target/linux/lantiq/patches-4.4/0032-USB-fix-roothub-for-IFXHCD.patch
+++ /dev/null
@@ -1,31 +0,0 @@
-From 326714a47233e4a524afa0c8398276fddf0dbd4d Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic at openwrt.org>
-Date: Thu, 6 Dec 2012 19:59:53 +0100
-Subject: [PATCH 32/36] USB: fix roothub for IFXHCD
-
----
- arch/mips/lantiq/Kconfig |    1 +
- drivers/usb/core/hub.c   |    2 +-
- 2 files changed, 2 insertions(+), 1 deletion(-)
-
---- a/arch/mips/lantiq/Kconfig
-+++ b/arch/mips/lantiq/Kconfig
-@@ -3,6 +3,7 @@ if LANTIQ
- config SOC_TYPE_XWAY
- 	bool
- 	select PINCTRL_XWAY
-+	select USB_ARCH_HAS_HCD
- 	default n
- 
- choice
---- a/drivers/usb/core/hub.c
-+++ b/drivers/usb/core/hub.c
-@@ -4356,7 +4356,7 @@ hub_port_init(struct usb_hub *hub, struc
- 		udev->ttport = hdev->ttport;
- 	} else if (udev->speed != USB_SPEED_HIGH
- 			&& hdev->speed == USB_SPEED_HIGH) {
--		if (!hub->tt.hub) {
-+		if (hdev->parent && !hub->tt.hub) {
- 			dev_err(&udev->dev, "parent hub has no TT\n");
- 			retval = -EINVAL;
- 			goto fail;