bluez: Add support for Raspberry Pi 3

- Adds bcm43xx-3wire variant.
- Resets UART speed after firmware download.
- Prints chip name when firmware isn't found for bcm43xx.
- Increases timeout for bcm43xx.
- Moves bcm43xx firmware to lib.

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

utils/bluez/patches/004-Move-the-43xx-firmware-into-lib-firmware.patch

@@ -0,0 +1,20 @@
+From 76681284b0ea49852041fdb97a35175089a08781 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 23 Feb 2016 17:52:29 +0000
+Subject: [PATCH 4/4] Move the 43xx firmware into /lib/firmware
+
+---
+ tools/hciattach_bcm43xx.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/tools/hciattach_bcm43xx.c
++++ b/tools/hciattach_bcm43xx.c
+@@ -43,7 +43,7 @@
+ #include "hciattach.h"
+ 
+ #ifndef FIRMWARE_DIR
+-#define FIRMWARE_DIR "/etc/firmware"
++#define FIRMWARE_DIR "/lib/firmware/brcm"
+ #endif
+ 
+ #define FW_EXT ".hcd"