Initial commit for the Sony NWZ linux port

SUPPORTED SERIES:
- NWZ-E450
- NWZ-E460
- NWZ-E470
- NWZ-E580
- NWZ-A10

NOTES:
- bootloader makefile convert an extra font to be installed alongside the bootloader
  since sysfont is way too small
- the toolsicon bitmap comes from the Oxygen iconset
- touchscreen driver is untested

TODO:
- implement audio routing driver (pcm is handled by pcm-alsa)
- fix playback: it crashes on illegal instruction in DEBUG builds
- find out why the browser starts at / instead of /contents
- implement radio support
- implement return to OF for usb handling
- calibrate battery curve (NB: of can report a battery level on a 0-5 scale but
  probabl don't want to use that ?)
- implement simulator build (we need a nice image of the player)
- figure out if we can detect jack removal

POTENTIAL TODOS:
- try to build a usb serial gadget and gdbserver

Change-Id: Ic77d71e0651355d47cc4e423a40fb64a60c69a80

firmware/export/config/sonynwza10.h

@@ -0,0 +1,16 @@
+/*
+ * This config file is for the Sony NW-A10 series
+ */
+
+/* For Rolo and boot loader */
+#define MODEL_NUMBER 104
+
+#define MODEL_NAME   "Sony NWZ-A10 Series"
+
+/* LCD dimensions */
+#define LCD_WIDTH  240
+#define LCD_HEIGHT 320
+/* sqrt(240^2 + 320^2) / 2 = 200 */
+#define LCD_DPI 200
+
+#include "sonynwzlinux.h"