[ffmpeg] don't try to enable libmfx on non-x86

[Dominik Mierzejewski]

commit 2a81e2241e828151f18f8220049c5e1d19a9621e
Author: Dominik 'Rathann' Mierzejewski <rpm at greysector.net>
Date:   Sat Sep 3 14:45:05 2016 +0200

    don't try to enable libmfx on non-x86

 ffmpeg.spec | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/ffmpeg.spec b/ffmpeg.spec
index ea034cb..4a92ae5 100644
--- a/ffmpeg.spec
+++ b/ffmpeg.spec
@@ -178,7 +178,6 @@ This package contains development files for %{name}
     %{?_with_gme:--enable-libgme} \\\
     --enable-libgsm \\\
     %{?_with_ilbc:--enable-libilbc} \\\
-    %{!?_without_qsv:--enable-libmfx} \\\
     --enable-libmp3lame \\\
     %{?_with_netcdf:--enable-netcdf} \\\
     %{!?_without_nvenc:--enable-nvenc --extra-cflags="-I%{_includedir}/nvenc"} \\\
@@ -245,6 +244,9 @@ cp -pr doc/examples/{*.c,Makefile,README} _doc/examples/
 %ifarch %{ix86}
     --cpu=%{_target_cpu} \
 %endif
+%ifarch %{ix86} x86_64
+    %{!?_without_qsv:--enable-libmfx} \\\
+%endif
 %ifarch %{ix86} x86_64 ppc ppc64
     --enable-runtime-cpudetect \
 %endif