chore(cdc): Add PADs to waivers
chore(cdc): Add PADs to waivers

PADs singals go though Pinmux module. Pinmux control signal comes from
IO_DIV2_CLK/ IO_DIV4_CLK. So, all signals violate the CDC.

This PR waives any outputs to the PADs.

chore(cdc): Add FIFO gray pointer to waiver

Signed-off-by: Eunchan Kim <cb7bc7ceb22698f298c67faa994fd9ddf3cab298@opentitan.org>

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