Build with Svt-Av1 only for x86_64

SPECS/libheif.spec

@@ -21,9 +21,11 @@ BuildRequires:  pkgconfig(libpng)
 BuildRequires:  pkgconfig(libsharpyuv)
 BuildRequires:  pkgconfig(rav1e)
 %endif
+%ifarch x86_64
 %if ! ((0%{?rhel} && 0%{?rhel} <= 8) || (0%{?fedora} && 0%{?fedora} < 38))
 BuildRequires:  pkgconfig(SvtAv1Enc)
 %endif
+%endif
 
 %description
 libheif is an ISO/IEC 23008-12:2017 HEIF and AVIF (AV1 Image File Format)
@@ -37,9 +39,11 @@ file format decoder and encoder.
 %if ! (0%{?rhel} && 0%{?rhel} <= 8)
 %{_libdir}/%{name}/%{name}-rav1e.so
 %endif
+%ifarch x86_64
 %if ! ((0%{?rhel} && 0%{?rhel} <= 8) || (0%{?fedora} && 0%{?fedora} < 38))
 %{_libdir}/%{name}/%{name}-svtenc.so
 %endif
+%endif
 
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