kill two gigabeat warnings

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11359 a1c6a512-1295-4272-9138-f99709370657

firmware/pcm_playback.c

@@ -68,6 +68,12 @@ void pcm_init(void)
 
 }
 
+static void dma_start(const void *addr, size_t size)
+{
+    (void)addr;
+    (void)size;
+}
+
 void pcm_set_frequency(unsigned int frequency)
 {
     (void)frequency;

firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.h

@@ -0,0 +1,22 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+/* chip-specific i2c functions */
+
+void i2c_send(int bus_address, int reg_address, const unsigned char buf);

firmware/target/arm/gigabeat/meg-fx/wmcodec-meg-fx.c

@@ -37,6 +37,7 @@
 #include "buffer.h"
 #include "audio.h"
 #include "i2c.h"
+#include "i2c-meg-fx.h"
 /*
  * Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit
  */