CD4021 fix in main version

[RightRudderLeftStick]

I know Magners made this firmware for me ages ago to get my TM grips compatibility working with an extension wire over 10cm

FreeJoy_1_7_1b4_jumpnshootman_v3.zip

I believe it had something to do with the timing. Wonder if this will get merged into the release version in the future.

[vostrenkov]

note for the future: clock frequency was reduced there