Remove useless warning causing trouble in sparc64
Remove useless warning causing trouble in sparc64

-Wcast-align is not that useful and just generates lots of warnings in
architectures like sparc64.

lucasdemarchi/kmod,pmmccorm/kmod,lucasdemarchi/kmod,pmmccorm/kmod,pmmccorm/kmod,lpereira/kmod,lucasdemarchi/kmod,Distrotech/kmod,Distrotech/kmod,lpereira/kmod,lpereira/kmod,Distrotech/kmod