sbc: fix "always_inline function might not be inlinable" warning
sbc: fix "always_inline function might not be inlinable" warning

"__attribute__((always_inline))" does not replace "inline" and they
still need to be used together. This fixes "always_inline function
might not be inlinable [-Wattributes]" warning in gcc 4.7

pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,ComputeCycles/bluez,pkarasev3/bluez,silent-snowman/bluez,mapfau/bluez,pkarasev3/bluez,mapfau/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,mapfau/bluez,pkarasev3/bluez,silent-snowman/bluez,silent-snowman/bluez,ComputeCycles/bluez,ComputeCycles/bluez,pkarasev3/bluez