sound: ASoC: DaVinci: Fix SFFSDR compilation error.

Remove dependency on sffsdr_fpga_set_codec_fs() when the
SFFSDR FPGA module is not selected.
Signed-off-by: Hugo Villeneuve <hugo@hugovil.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
(cherry picked from commit 04c5ca6a180c478beca953b3268cc3b806b6015d)

sound/soc/davinci/davinci-sffsdr.c

@@ -25,7 +25,9 @@
 
 #include <asm/dma.h>
 #include <asm/mach-types.h>
+#ifdef CONFIG_SFFSDR_FPGA
 #include <asm/plat-sffsdr/sffsdr-fpga.h>
+#endif
 
 #include <mach/asp.h>
 #include <mach/edma.h>
@@ -43,6 +45,17 @@ static int sffsdr_hw_params(struct snd_pcm_substream *substream,
 	int fs;
 	int ret = 0;
 
+	/* Fsref can be 32000, 44100 or 48000. */
+	fs = params_rate(params);
+
+#ifndef CONFIG_SFFSDR_FPGA
+	/* Without the FPGA module, the Fs is fixed at 44100 Hz */
+	if (fs != 44100) {
+		pr_debug("warning: only 44.1 kHz is supported without SFFSDR FPGA module\n");
+		return -EINVAL;
+	}
+#endif
+
 	/* Set cpu DAI configuration:
 	 * CLKX and CLKR are the inputs for the Sample Rate Generator.
 	 * FSX and FSR are outputs, driven by the sample Rate Generator. */
@@ -53,12 +66,13 @@ static int sffsdr_hw_params(struct snd_pcm_substream *substream,
 	if (ret < 0)
 		return ret;
 
-	/* Fsref can be 32000, 44100 or 48000. */
-	fs = params_rate(params);
-
 	pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
 
+#ifndef CONFIG_SFFSDR_FPGA
+	return 0;
+#else
 	return sffsdr_fpga_set_codec_fs(fs);
+#endif
 }
 
 static struct snd_soc_ops sffsdr_ops = {