at91: add kernel support for sama7g5 soc

Add kernel support for SAMA7G5 by back-porting mainline kernel patches.
Among SAMA7G5 features could be remembered:
- ARM Cortex-A7
- double data rate multi-port dynamic RAM controller supporting DDR2,
  DDR3, DDR3L, LPDDR2, LPDDR3 up to 533MHz
- peripherals for audio, video processing
- 1 gigabit + 1 megabit Ethernet controllers
- 6 CAN controllers
- trust zone support
- DVFS for CPU
- criptography IPs

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>

target/linux/at91/patches-5.10/188-ASoC-atmel-i2s-Set-symmetric-sample-bits.patch

@@ -0,0 +1,31 @@
+From a6f337fdf68294cfae233724567cbeea0ae5148f Mon Sep 17 00:00:00 2001
+From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+Date: Fri, 18 Jun 2021 18:07:40 +0300
+Subject: [PATCH 188/247] ASoC: atmel-i2s: Set symmetric sample bits
+
+The I2S needs to have the same sample bits for both capture and playback
+streams.
+
+Fixes: b543e467d1a9 ("ASoC: atmel-i2s: add driver for the new Atmel I2S controller")
+Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+Link: https://lore.kernel.org/r/20210618150741.401739-1-codrin.ciubotariu@microchip.com
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ sound/soc/atmel/atmel-i2s.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/sound/soc/atmel/atmel-i2s.c b/sound/soc/atmel/atmel-i2s.c
+index e7169c63becd..2a5bc7a54e6c 100644
+--- a/sound/soc/atmel/atmel-i2s.c
++++ b/sound/soc/atmel/atmel-i2s.c
+@@ -560,6 +560,7 @@ static struct snd_soc_dai_driver atmel_i2s_dai = {
+ 	},
+ 	.ops = &atmel_i2s_dai_ops,
+ 	.symmetric_rates = 1,
++	.symmetric_samplebits = 1,
+ };
+ 
+ static const struct snd_soc_component_driver atmel_i2s_component = {
+-- 
+2.32.0
+