https://github.com/maxxproff/avrdude-ch341

I can understand that you are mainly interested in fast
programming - but if it fails to operate on AVRs the way
they are shipped (i.e., clocked with 1 MHz), it doesn't make
much sense to include it. You'd need something else then to
reprogram the fuses for higher clock, but if you've got
"something else", why not also use it for actual programming?

Sorry, I have tested it more and more, and it really works!
Patch needs some cleanup, but not serious.
BUT it works only with fast devices,
it needs LOW SCK option.
For example, it fail with the atmega8L default fuses (0xD9E1 internal osc)
but works fine with the same atmega8L overclocked to 12Mhz (0xC9FF external crystal).
I learn more for fix it...

Compiled at Raspbian-Jessie some warnings
[code]
gcc -DHAVE_CONFIG_H -I.  -DCONFIG_DIR=\"/usr/local/etc\"  -Wall -Wno-pointer-sign -g -O2 -MT libavrdude_a-ch341a.o -MD -MP -MF .deps/libavrdude_a-ch341a.Tpo -c -o libavrdude_a-ch341a.o `test -f 'ch341a.c' || echo './'`ch341a.c
ch341a.c: In function 'ch341a_spi_transfer':
ch341a.c:272:14: warning: unused variable 'bytestransferred' [-Wunused-variable]
     int ret, bytestransferred;
              ^
ch341a.c:272:9: warning: unused variable 'ret' [-Wunused-variable]
     int ret, bytestransferred;
         ^
ch341a.c: In function 'ch341a_initpgm':
ch341a.c:381:25: warning: assignment from incompatible pointer type
     pgm->spi            = ch341a_spi;
                         ^
ch341a.c: At top level:
ch341a.c:269:12: warning: 'ch341a_spi_transfer' defined but not used [-Wunused-function]
 static int ch341a_spi_transfer(PROGRAMMER * pgm, const unsigned char *cmd, unsigned char *res) {
            ^
[/code]

Succesful maked it works with UsbAsp but not works with ch341a.