AGCH is reported as part of the PCH because we are not searching
for the BS-AG-BLKS-RES inside the SI3 and do not use MphConfigReq
to change this setting.
From our header files v2.4 onwards, we include some macros that allow us
to do compile-time checks for the API header version. As older headers
don't have those macros, we have to fall back to assume it will be v2.2
