refactor(chip): Define MIO/ DIO map to IOs
refactor(chip): Define MIO/ DIO map to IOs

This commit adds maps from MIO/DIO index to actual PAD (chip_io_e).
These parameter are helpful when vseq needs to deal with PINMUX config
as PINMUX does not have PAD info but the index of MIO/DIO.

Signed-off-by: Eli Kim <3ca62a2ad87376be2697209a1770e1afdbbba220@opentitan.org>

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