AES1610: driver cleanup, part #1
AES1610: driver cleanup, part #1

Fix warnings reported by gcc

https://bugs.freedesktop.org/show_bug.cgi?id=56439

sbambrough/libfprint_extended,hyperair/fprint-bsapi,payden/libfprint,yingted/etes603,PDXostc/libfprint,yingted/etes603,micw/libfprint,FabriceSalvaire/libfprint-baspi,sbambrough/libfprint_extended,abhishekgahlot/libfprint,hyperair/fprint-bsapi,anarsoul/libfprint,Gnate/libfprint,micw/libfprint,sbambrough/libfprint_extended,abhishekgahlot/libfprint,jipumarino/libfprint,abhishekgahlot/fprint-bsapi,rmarku/libfprint,zemen/libfprint,rmarku/libfprint,PDXostc/libfprint,Gnate/libfprint,abhishekgahlot/libfprint,FabriceSalvaire/libfprint-baspi,zOrg1331/libfprint,ccsystems/libfprint,jipumarino/libfprint,ccsystems/libfprint,payden/libfprint,zemen/libfprint,micw/libfprint,freedesktop-unofficial-mirror/libfprint__libfprint,zOrg1331/libfprint,abhishekgahlot/fprint-bsapi,payden/libfprint,zemen/libfprint,anarsoul/libfprint,ccsystems/libfprint,FabriceSalvaire/libfprint-baspi,jipumarino/libfprint,iafilatov/libfprint,PDXostc/libfprint,Gnate/libfprint,freedesktop-unofficial-mirror/libfprint__libfprint,abhishekgahlot/fprint-bsapi,freedesktop-unofficial-mirror/libfprint__libfprint,rmarku/libfprint,zOrg1331/libfprint,yingted/etes603,hyperair/fprint-bsapi