ASoC: jz4740: Add jz4780 support

The jz4780 and jz4740 have very similar i2s blocks.

The slight difference is in Rx/Tx fifos.
And the bitclocks for input/output are different.

This patch adds jz4780 support to the driver

Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/Documentation/devicetree/bindings/sound/ingenic,jz4740-i2s.txt b/Documentation/devicetree/bindings/sound/ingenic,jz4740-i2s.txt
index b414333..b623d50 100644
--- a/Documentation/devicetree/bindings/sound/ingenic,jz4740-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/ingenic,jz4740-i2s.txt
@@ -1,7 +1,7 @@
 Ingenic JZ4740 I2S controller
 
 Required properties:
-- compatible : "ingenic,jz4740-i2s"
+- compatible : "ingenic,jz4740-i2s" or "ingenic,jz4780-i2s"
 - reg : I2S registers location and length
 - clocks : AIC and I2S PLL clock specifiers.
 - clock-names: "aic" and "i2s"