sunxi: add a kmod package for sun4i_spdif

Tested on a A20 board:
$ cat /proc/asound/cards
 0 [SPDIF          ]: On-board_SPDIF - On-board SPDIF
                      On-board SPDIF

Size of the module for a 32bit kernel:
60708 linux-5.4.66/sound/soc/sunxi/sun4i-spdif.ko

Signed-off-by: Andre Heider <[email protected]>

target/linux/sunxi/modules.mk

@@ -68,7 +68,6 @@ endef
 
 $(eval $(call KernelPackage,sun4i-emac))
 
-
 define KernelPackage/sound-soc-sunxi
   TITLE:=AllWinner built-in SoC sound support
   KCONFIG:=CONFIG_SND_SUN4I_CODEC
@@ -83,3 +82,18 @@ define KernelPackage/sound-soc-sunxi/description
 endef
 
 $(eval $(call KernelPackage,sound-soc-sunxi))
+
+define KernelPackage/sound-soc-sunxi-spdif
+  TITLE:=Allwinner A10 SPDIF Support
+  KCONFIG:=CONFIG_SND_SUN4I_SPDIF
+  FILES:=$(LINUX_DIR)/sound/soc/sunxi/sun4i-spdif.ko
+  AUTOLOAD:=$(call AutoLoad,65,sun4i-spdif)
+  DEPENDS:=@TARGET_sunxi +kmod-sound-soc-spdif
+  $(call AddDepends/sound)
+endef
+
+define KernelPackage/sound-soc-sunxi-spdif/description
+  Kernel support for Allwinner A10 SPDIF Support
+endef
+
+$(eval $(call KernelPackage,sound-soc-sunxi-spdif))