3 options for you:
1. Compile 4.4 kernel
2. Select MUSB_PIO_ONLY option for 4.3 kernel
3. Apply this patch from 4.4 to 4.3 kernel https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/usb/musb/sunxi.c?id=f301fe22bab90a0377096bfd831ef7c99ece1a40
Now I'm using 4.3 kernel with patch and have working OTG