ASoC: xlnx: enable SPDIF driver build

Added SPDIF driver build related changes.
Signed-off-by: NMaruthi Srinivas Bayyavarapu <maruthi.srinivas.bayyavarapu@xilinx.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/xilinx/Kconfig

@@ -13,3 +13,10 @@ config SND_SOC_XILINX_AUDIO_FORMATTER
           Select this option to enable Xilinx audio formatter
           support. This provides DMA platform device support for
           audio functionality.
+
+config SND_SOC_XILINX_SPDIF
+        tristate "Audio support for the the Xilinx SPDIF"
+        help
+          Select this option to enable Xilinx SPDIF Audio.
+          This provides playback and capture of SPDIF audio in
+          AES format.

sound/soc/xilinx/Makefile

@@ -2,3 +2,5 @@ snd-soc-xlnx-i2s-objs      := xlnx_i2s.o
 obj-$(CONFIG_SND_SOC_XILINX_I2S) += snd-soc-xlnx-i2s.o
 snd-soc-xlnx-formatter-pcm-objs := xlnx_formatter_pcm.o
 obj-$(CONFIG_SND_SOC_XILINX_AUDIO_FORMATTER) += snd-soc-xlnx-formatter-pcm.o
+snd-soc-xlnx-spdif-objs := xlnx_spdif.o
+obj-$(CONFIG_SND_SOC_XILINX_SPDIF) += snd-soc-xlnx-spdif.o