brcm2708: add linux 4.4 support

- random-bcm2708 and spi-bcm2708 have been removed.
- sound-soc-bcm2708-i2s has been upstreamed as sound-soc-bcm2835-i2s.

Let's keep linux 4.1 for a while, since linux 4.4 appears to have some issues
with multicast traffic on RPi ethernet:
https://gist.github.com/Noltari/5b1cfdecce5ed4bc08fd

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

SVN-Revision: 48266

1 files changed, 44 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.4/0019-bcm2835-i2s-Enable-MMAP-support-via-a-DT-property.patch b/target/linux/brcm2708/patches-4.4/0019-bcm2835-i2s-Enable-MMAP-support-via-a-DT-property.patch
new file mode 100644
index 0000000000..c422cc7224
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0019-bcm2835-i2s-Enable-MMAP-support-via-a-DT-property.patch
@@ -0,0 +1,44 @@
+From 61f155e164c5dbfa5cec9a099e4aa802c2155423 Mon Sep 17 00:00:00 2001
+From: Matthias Reichl <hias@horus.com>
+Date: Sun, 11 Oct 2015 15:55:21 +0200
+Subject: [PATCH 019/127] bcm2835-i2s: Enable MMAP support via a DT property
+
+Code ported from bcm2708-i2s driver in Raspberry Pi tree.
+
+RPi commit 7ee829fd77a30127db5d0b3c7d79b8718166e568 ("bcm2708-i2s:
+Enable MMAP support via a DT property and overlay")
+
+The i2s driver used to claim to support MMAP, but that feature was disabled
+when some problems were found. Add the ability to enable this feature
+through Device Tree, using the i2s-mmap overlay.
+
+See: #1004
+
+Signed-off-by: Matthias Reichl <hias@horus.com>
+---
+ sound/soc/bcm/bcm2835-i2s.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+--- a/sound/soc/bcm/bcm2835-i2s.c
++++ b/sound/soc/bcm/bcm2835-i2s.c
+@@ -799,7 +799,7 @@ static const struct snd_soc_component_dr
+ 	.name		= "bcm2835-i2s-comp",
+ };
+ 
+-static const struct snd_pcm_hardware bcm2835_pcm_hardware = {
++static struct snd_pcm_hardware bcm2835_pcm_hardware = {
+ 	.info			= SNDRV_PCM_INFO_INTERLEAVED |
+ 				  SNDRV_PCM_INFO_JOINT_DUPLEX,
+ 	.formats		= SNDRV_PCM_FMTBIT_S16_LE |
+@@ -835,6 +835,11 @@ static int bcm2835_i2s_probe(struct plat
+ 	}
+ 	dma_reg_base = be32_to_cpup(addr);
+ 
++	if (of_property_read_bool(pdev->dev.of_node, "brcm,enable-mmap"))
++		bcm2835_pcm_hardware.info |=
++			SNDRV_PCM_INFO_MMAP |
++			SNDRV_PCM_INFO_MMAP_VALID;
++
+ 	/* Request both ioareas */
+ 	for (i = 0; i <= 1; i++) {
+ 		void __iomem *base;