Your rom, as usual, work fine in my Onn 07D (Yifang M7100KLD), using the kernel you posted.
Only drawback is that is turned 90° I'll try to fix it in build.prop (If you put the parameter there, if not kindly tell me how how can I fix it).

Now is in tests and I let you know if I found something wrong.
One things is great for the moment, screen design is better that the android 4.2.2 that comes with the tablet (was an android for tablet with buttons in center and status on top). 
I've installed TWRP recovery 2.7.0.0 (from here) for testing purposes. Is touch and a bit slow. I'll let you know.

I try first with your rom KitKat (Oma KitKat build v1.1) and it wasn't capable to go further than kernel screen, probably is for a different type of screen. At least different than your rom for TRC7.

Oma7144 said
Turned in which direction?

KitKat not possible without selinux kernel.

- Om a-

In portrait screen is turned to the right (IMG_p)
In landscape screen is turned to the left (IMG_l)

Oma7144 said
Ok, seems to be we need the sensors.rk30board.so from the stock build.

- Oma -

Here is such module taken from original build, sensors.rk30board.so named as sensors.rk30board.txt, just rename it.

Or you can tell me how can I insert this in the tablet, if it's possible.

Oma7144 said
Ok, first try: http://crewrktablets.arctablet.com/?wpfb_dl=1743

Install via CWM.

- Oma -

Done.
Unfortunately didn't work... nothing changed.

Do you think I can try the other rom for 4.2.2 (Chuwi V17pro Android 4.2.2 Jelly Bean custom root firmware (2014/04/18))... which is better?

Another question what is a SELinux kernel?

Oma7144 said
Ok, the we need to look under the hood

Pls upload the system.img and a dmesg log.
...

- Oma -

I did a dump some time ago... it's complete here

Enclosed dmesg.txt

Oma7144 said
Download again and try: http://crewrktablets.arctablet.com/?wpfb_dl=1743

- Oma -

¿Have you made a new version?

The one you posted and the fix are the same as before.

Oma7144 said
No, only the name is the same. Pls test.

- Oma -

Ok I've done what you suggest.
1. Downloaded Oma TRC7 JB v1.0 from post 1 of this thread,
2. Downloaded kernel Onn 07D – http://crewrktablets.arctablet.com/?wpfb_dl=1728 from post 2, used in flash,
3. Downloaded fix http://crewrktablets.arctablet.com/?wpfb_dl=1743 from post 12 above, installed via CWM,
4. Instructions followed strictly from package.
Rom run great... with problems in rotation.

Result:
Landscape displayed fine. 
Portrait displayed turned 180°

Thanks for your time