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/SOURCES

@@ -95,6 +95,23 @@ target/hosted/samsungypr/radio-ypr.c
 #endif
 #endif
 
+#ifdef SONY_NWZ_LINUX
+target/hosted/backtrace-glibc.c
+target/hosted/kernel-unix.c
+target/hosted/filesystem-unix.c
+target/hosted/lc-unix.c
+target/hosted/pcm-alsa.c
+target/hosted/sonynwz/lcd-nwz.c
+target/hosted/sonynwz/button-nwz.c
+target/hosted/sonynwz/system-nwz.c
+target/hosted/sonynwz/powermgmt-nwz.c
+target/hosted/sonynwz/power-nwz.c
+target/hosted/sonynwz/adc-nwz.c
+target/hosted/sonynwz/debug-nwz.c
+target/hosted/sonynwz/nvp-nwz.c
+target/hosted/sonynwz/nwz-db.c
+#endif
+
 #if defined(SAMSUNG_YPR0) && !defined(SIMULATOR)
 drivers/adc-as3514.c
 #if (CONFIG_RTC == RTC_AS3514)
@@ -447,6 +464,9 @@ target/hosted/pcm-alsa.c
 #elif defined(SAMSUNG_YPR1) && defined(HAVE_WM8978)
 drivers/audio/wm8978.c
 target/hosted/pcm-alsa.c
+#elif defined(HAVE_NWZ_LINUX_CODEC)
+drivers/audio/nwzlinux-codec.c
+target/hosted/alsa-controls.c
 #elif defined(HAVE_SDL_AUDIO)
 drivers/audio/sdl.c
 #if CONFIG_CODEC == SWCODEC