samsung-i927: Updates

Since mesa-grate is armv7 now, we can switch too.

[ci:skip-build]: already built successfully in CI

I don't know why build fails on gitlab, I have not changed anything
in kernel. Anyway, I don't remember why I enabled this, so I guess it's safe
to disable this option.

- Bluetooth is now working
- Audio works too (speaker/headphones/earpiece/mic - internal and headset)
- Keyboard layout for X11
- Xorg config for rotated screen
- Suspend issues fixed (tested on MATE)
- OTG bindings updated - not working yet