brcm2708: update linux 4.4 patches to latest version

As usual these patches were extracted and rebased from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/brcm2708/patches-4.4/0046-char-broadcom-Add-vcio-module.patch

@@ -1,4 +1,4 @@
-From 0fed71c0553d0bc86798f395c7e354cd132c9802 Mon Sep 17 00:00:00 2001
+From a7543fe261e31e16e8a6c1804d562556f0c1b794 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
 Date: Fri, 26 Jun 2015 14:27:06 +0200
 Subject: [PATCH] char: broadcom: Add vcio module