Yocto 3.3.2 update + USB Audio support

This release is a flashable package based on the following repos:

• Unlocked Bootloader (LK): https://github.com/Biktorgj/quectel_lk/releases
• Linux 3.18.140 Kernel: https://github.com/Biktorgj/quectel_eg25_kernel
• Forked meta-qcom layer: https://github.com/Biktorgj/meta-qcom/
• Yocto 3.3.2 based rootfs and recovery (https://www.yoctoproject.org/)
• Custom scripts to make it all work
• Make sure you also install this newer ADSP firmware: https://github.com/Biktorgj/quectel_eg25_recovery/raw/EG25GGBR07A08M2G_01.003.01.003/update/NON-HLOS.ubi (download and run fastboot flash modem NON-HLOS.ubi )

Before you begin

Please, take a minute to get a copy of the stock firmware here (https://github.com/Biktorgj/quectel_eg25_recovery), and carefully read the README. If you don't know understand what it says, or don't know how to recover the firmware in case something goes wrong, avoid touching your modem

CHANGES FROM PREVIOUS RELEASE

• Yocto updated to 3.3.2
• Persistent USB Audio support (thanks @gregvish!)
• USB init scripts now waits for alsa to be fully ready (so it doesn't crash on boot with USB audio persist flag set because it wasn't yet ready)
• Flashing script now doesn't require two reboots to finish (thanks @kkeijzer!)
• Debug UART is available again (for those with external modems or access to the debug pins (ubports revision or earlier)

Installation instructions:

1. Get required tools: you need adb and fastboot

2. Grab a copy of the firmware, and, optionally, a recovery firmware (https://github.com/Biktorgj/quectel_eg25_recovery)

3. Run the flashall script bundled in the package. If something fails, flash manually

4. After you flashed everything, you can run 'fastboot reboot' and wait for it to come back.

Have fun!