[SANTINO][DTS] Change sound driver

Changed audio driver for SGTL5000 codec. The `simple-audio-card` didn't
create the sound card. The speaker enable needs to be driven by the OS.

Test procedure:
```
root@seco-imx6dl-santino:~# amixer sset Lineout unmute
root@seco-imx6dl-santino:~# amixer sset Lineout 31
root@seco-imx6dl-santino:~# amixer sset PCM 192
root@seco-imx6dl-santino:~# gpioset gpiochip4 29=1
root@seco-imx6dl-santino:~# aplay -Dhw:0,0 /usr/share/sounds/alsa/Front_Right.wav
```

JIRA Reference: [SANTINO-23]

arch/arm/boot/dts/seco/seco-imx6dl-santino.dtsi

@@ -178,9 +178,6 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_audmux4>;
 	status = "okay";
-	cpu_dai: simple-audio-card,cpu {
-		sound-dai = <&ssi2>;
-	};
 };
 
 &ssi2 {

arch/arm/boot/dts/seco/seco-imx6qdl-san.dtsi

@@ -177,26 +177,21 @@
 	};
 
 	sound: sgtl5000-audio {
-		compatible = "simple-audio-card";
-		simple-audio-card,name = "imx6-sgtl5000-audio";
-		simple-audio-card,format = "i2s";
-		simple-audio-card,widgets =
-			"Microphone", "Mic Jack",
-			"Line", "Line In",
-			"Line", "Line Out",
-			"Headphone", "Headphone Jack";
-		simple-audio-card,routing =
-			"MIC_IN", "Mic Jack",
+		compatible = "fsl,imx6q-seco-sgtl5000", "fsl,imx-audio-sgtl5000";
+		model = "fsl,imx6q-seco-sgtl5000";
+		cpu-dai = <&ssi2>;
+		ssi-controller = <&ssi2>;
+		audio-codec = <&codec>;
+		audio-routing = "MIC_IN", "Mic Jack",
 			"Mic Jack", "Mic Bias",
-			"Headphone Jack", "HP_OUT";
-		simple-audio-card,aux-devs = <&amplifier>;
+			"Headphone Jack", "HP_OUT",
+			"Line Out Jack", "LINE_OUT";
+		mux-int-port = <1>;
+		mux-ext-port = <6>;
+		frame-master;
+		bitclock-master;
+		dai-format = "i2s";
 		status = "disabled";
-		codec_dai: simple-audio-card,codec {
-			sound-dai = <&codec>;
-			clocks = <&audio_codec_clk>;
-			frame-master;
-			bitclock-master;
-		};
 	};
 
 	spreadspectrum: spreadspectrum {