kernel: bump to 4.4.40

Refresh patches on all 4.4 supported platforms.
Compile & run tested: lantiq/xrx200

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/brcm2708/patches-4.4/0029-Add-dwc_otg-driver.patch

@@ -659,7 +659,7 @@ dwc_otg: Remove duplicate gadget probe/unregister function
  }
 --- a/drivers/usb/core/hub.c
 +++ b/drivers/usb/core/hub.c
-@@ -4972,7 +4972,7 @@ static void port_event(struct usb_hub *h
+@@ -4943,7 +4943,7 @@ static void port_event(struct usb_hub *h
  	if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
  		u16 status = 0, unused;
  

target/linux/brcm2708/patches-4.4/0081-spidev-Add-spidev-compatible-string-to-silence-warni.patch

@@ -8,11 +8,9 @@ See: https://github.com/raspberrypi/linux/issues/1054
  drivers/spi/spidev.c | 1 +
  1 file changed, 1 insertion(+)
 
-Index: linux-4.4.39/drivers/spi/spidev.c
-===================================================================
---- linux-4.4.39.orig/drivers/spi/spidev.c	2016-12-20 13:45:27.000000000 +0100
-+++ linux-4.4.39/drivers/spi/spidev.c	2016-12-20 13:46:06.627326840 +0100
-@@ -696,6 +696,7 @@
+--- a/drivers/spi/spidev.c
++++ b/drivers/spi/spidev.c
+@@ -696,6 +696,7 @@ static const struct of_device_id spidev_
  	{ .compatible = "rohm,dh2228fv" },
  	{ .compatible = "lineartechnology,ltc2488" },
  	{ .compatible = "siliconlabs,si3210" },