Adds an explicit _ah parameter to most macros that previously had a
hidden dependency on ah. This makes the code more compliant with the
style guide.

This change does not appear to affect the final binary.
Signed-off-by: NWenli Looi <wlooi@ucalgary.ca>
Acked-by: NToke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: NKalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/c8369317-cf84-f0e3-fe8-9b6e22e43a6a@ucalgary.ca