sunxi: add support for kernel 4.9

Most of the patches were backpoprts from the mainline kernel and are
integrated upstream now.

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

target/linux/sunxi/patches-4.9/115-musb-ignore-vbus-errors.patch

@@ -0,0 +1,26 @@
+From fce20ac5d8c98f1a8ea5298051d9fa669e455f04 Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Tue, 4 Aug 2015 23:22:45 +0200
+Subject: [PATCH] musb: sunxi: Ignore VBus errors in host-only mode
+
+For some unclear reason sometimes we get VBus errors in host-only mode,
+even though we do not have any vbus-detection then. Ignore these.
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/usb/musb/sunxi.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/drivers/usb/musb/sunxi.c
++++ b/drivers/usb/musb/sunxi.c
+@@ -202,6 +202,10 @@ static irqreturn_t sunxi_musb_interrupt(
+ 		musb_writeb(musb->mregs, MUSB_FADDR, 0);
+ 	}
+ 
++	/*  Ignore Vbus errors when in host only mode */
++	if (musb->port_mode == MUSB_PORT_MODE_HOST)
++		musb->int_usb &= ~MUSB_INTR_VBUSERROR;
++
+ 	musb->int_tx = readw(musb->mregs + SUNXI_MUSB_INTRTX);
+ 	if (musb->int_tx)
+ 		writew(musb->int_tx, musb->mregs + SUNXI_MUSB_INTRTX);