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/003-Increase-firmware-load-timeout-to-30s.patch

@@ -0,0 +1,20 @@
+From d41dc2046dd08d8c95197f677e224506f5b39bdd Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Wed, 20 Jan 2016 16:00:37 +0000
+Subject: [PATCH 3/4] Increase firmware load timeout to 30s
+
+---
+ tools/hciattach.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/tools/hciattach.c
++++ b/tools/hciattach.c
+@@ -1293,7 +1293,7 @@ int main(int argc, char *argv[])
+ {
+ 	struct uart_t *u = NULL;
+ 	int detach, printpid, raw, opt, i, n, ld, err;
+-	int to = 10;
++	int to = 30;
+ 	int init_speed = 0;
+ 	int send_break = 0;
+ 	pid_t pid;