arm64: dts: db820c: add support to LS-SPI0

This patch adds support to SPI on LS expansion connector.
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NAndy Gross <andy.gross@linaro.org>

arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi

@@ -20,6 +20,7 @@
 		i2c0	= &blsp1_i2c2;
 		i2c1	= &blsp2_i2c1;
 		i2c2	= &blsp2_i2c0;
+		spi0	= &blsp1_spi0;
 	};
 
 	chosen {
@@ -55,6 +56,12 @@
 			status = "okay";
 		};
 
+		spi@07575000 {
+		/* On Low speed expansion */
+			label = "LS-SPI0";
+			status = "okay";
+		};
+
 		i2c@075b5000 {
 		/* On High speed expansion */
 			label = "HS-I2C2";