Cleanup python requirements
Cleanup python requirements

Sort the requirements list and remove duplicates.

Signed-off-by: Tobias Wölfel <5d52ef3ca07cd47a5b2415323e8983bd6b99d040@mailbox.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan