Extract the Marvell 88w8618 audio device from musicpal.c

Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Signed-off-by: Andrzej Zaborowski <balrogg@gmail.com>
diff --git a/Makefile.target b/Makefile.target
index 1fee0d9..595c88b 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -272,7 +272,7 @@
 obj-arm-y += omap_sx1.o palm.o tsc210x.o
 obj-arm-y += nseries.o blizzard.o onenand.o vga.o cbus.o tusb6010.o usb-musb.o
 obj-arm-y += mst_fpga.o mainstone.o
-obj-arm-y += musicpal.o pflash_cfi02.o bitbang_i2c.o
+obj-arm-y += musicpal.o pflash_cfi02.o bitbang_i2c.o marvell_88w8618_audio.o
 obj-arm-y += framebuffer.o
 obj-arm-y += syborg.o syborg_fb.o syborg_interrupt.o syborg_keyboard.o
 obj-arm-y += syborg_serial.o syborg_timer.o syborg_pointer.o syborg_rtc.o