brcm2708: update linux 4.4 patches to latest version

As usual these patches were extracted 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

@@ -1,7 +1,7 @@
-From 75804edaed6c45d813dcee866d39445130d82539 Mon Sep 17 00:00:00 2001
+From 3423e9a9b7e0d6e988832d1362f2fb3ce76bf07c 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 046/232] char: broadcom: Add vcio module
+Subject: [PATCH 046/304] char: broadcom: Add vcio module
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