x86: hevcdsp_init: fix macro usage

The macro was not using the parameter but unconditionally using sse4.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
x86: hevc_mc: remove unneeded shift

The immediate value may be 0.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>