sbc: make check_mmx_support() a proper C function
sbc: make check_mmx_support() a proper C function

Signed-off-by: Lennart Poettering <9bb3d23d041c1d0454e62fec951f9aa4dfa2787f@poettering.net>

pstglia/external-bluetooth-sbc,pstglia/external-bluetooth-sbc