sunxi: fix typo in device packages for MarsBoard A10

The kmod prefix for sound-soc-sunxi is missing, fix it.
Also add kmod-sound-core as dependence.

Fixes: 6a356598 ("sunxi: Added profile for HAOYU Electronics Marsboard A10")
Signed-off-by: NChukun Pan <amadeus@jmu.edu.cn>

target/linux/sunxi/image/cortexa8.mk

@@ -22,8 +22,8 @@ TARGET_DEVICES += linksprite_a10-pcduino
 define Device/marsboard_a10-marsboard
   DEVICE_VENDOR := HAOYU Electronics
   DEVICE_MODEL := MarsBoard A10
-  DEVICE_PACKAGES:=kmod-ata-core kmod-ata-sunxi kmod-sun4i-emac kmod-rtc-sunxi \
-	sound-soc-sunxi
+  DEVICE_PACKAGES:=kmod-ata-core kmod-ata-sunxi kmod-sun4i-emac \
+	kmod-rtc-sunxi kmod-sound-core kmod-sound-soc-sunxi
   SOC := sun4i
 endef
 TARGET_DEVICES += marsboard_a10-marsboard