Work on Alcor_Micro_AU6601

Hello devs,

i work on RE of Alcor Micro AU6601. For now i gathered some information about this chip:
https://wikidevi.com/wiki/Alcor_Micro_AU6601
and created documentation for registers i was able to find and to describe:
https://docs.google.com/document/d/1jnRACLJn14jBpKuYBa4i0OvmwZ9qD8xm1xnIo4H0gGk/pub

Since i have absolutely no experience with MMC subsystem i would be thankful for help, tips or comments.

Regards,
Oleksij