New port: AIGO EROS Q / EROS K

The Q and K have a slightly different case, but the hardware under the
shell is completely identical.

These models are rebadged versions:

 * Hifiwalker H2   (== Q)
 * AGPTek H3       (== K)
 * Surfans F20     (== K)

Other notes:

  * Significant improvements in the shared Hiby-platform launcher/loader
    * SD card can theoretically be hot-swapped now
    * Support external USB mass storage!
  * Some consolidation of Hiby-platform targets
  * Some consolidation of plugin keymaps

Todo/known issues:

 * Keymaps need to be gone over properly
 * Convert to HAVE_SCROLLWHEEL?

Change-Id: I5a8a4f22c38a5b69392ca7c0a8ad8c4e07d9523c

firmware/SOURCES

@@ -115,7 +115,7 @@ target/hosted/sonynwz/nvp-nwz.c
 target/hosted/sonynwz/nwz-db.c
 #endif
 
-#if ((defined(AGPTEK_ROCKER) || defined(XDUOO_X3II) || defined(XDUOO_X20) || defined(FIIO_M3K)) && !defined(SIMULATOR))
+#if ((defined(HIBY_LINUX) || defined(FIIO_M3K)) && !defined(SIMULATOR))
 drivers/lcd-memframe.c
 target/hosted/alsa-controls.c
 target/hosted/pcm-alsa.c
@@ -155,6 +155,14 @@ target/hosted/fiio/system-fiio.c
 target/hosted/fiio/usb-fiio.c
 #endif
 
+#if (defined(EROS_Q)) && !defined(SIMULATOR)
+target/hosted/aigo/button-erosq.c
+target/hosted/aigo/debug-erosq.c
+target/hosted/aigo/power-erosq.c
+target/hosted/aigo/powermgmt-erosq.c
+target/hosted/aigo/usb-erosq.c
+#endif
+
 #if defined(SAMSUNG_YPR0) && !defined(SIMULATOR)
 drivers/adc-as3514.c
 #if (CONFIG_RTC == RTC_AS3514)
@@ -513,6 +521,8 @@ drivers/audio/rocker_codec.c
 drivers/audio/xduoolinux_codec.c
 #elif defined(HAVE_FIIO_LINUX_CODEC) && !defined(SIMULATOR)
 drivers/audio/fiiolinux_codec.c
+#elif defined(HAVE_EROSQ_LINUX_CODEC) && !defined(SIMULATOR)
+drivers/audio/erosqlinux_codec.c
 #elif defined(HAVE_SDL_AUDIO)
 drivers/audio/sdl.c