Retire OpenMAX suppot

Upstream has dropped it, in Fedora there's little (if anything)
that supports it, we enabled it ages ago as some ancient arm
hardware we supported at the time used it but that all went
away when we retired ARMv7.

mesa.spec

@@ -12,7 +12,6 @@
 %if 0%{?with_vulkan_hw}
 %global with_nvk %{with_vulkan_hw}
 %endif
-%global with_omx 1
 %global with_opencl 1
 %endif
 %global base_vulkan %{?with_vulkan_hw:,amd}%{!?with_vulkan_hw:%{nil}}
@@ -134,9 +133,6 @@ BuildRequires:  pkgconfig(vdpau) >= 1.1
 %if 0%{?with_va}
 BuildRequires:  pkgconfig(libva) >= 0.38.0
 %endif
-%if 0%{?with_omx}
-BuildRequires:  pkgconfig(libomxil-bellagio)
-%endif
 BuildRequires:  pkgconfig(libelf)
 BuildRequires:  pkgconfig(libglvnd) >= 1.3.2
 BuildRequires:  llvm-devel >= 7.0.0
@@ -185,6 +181,7 @@ BuildRequires:  pkgconfig(vulkan)
 %package filesystem
 Summary:        Mesa driver filesystem
 Provides:       mesa-dri-filesystem = %{?epoch:%{epoch}:}%{version}-%{release}
+Obsoletes:      mesa-omx-drivers < %{?epoch:%{epoch}:}%{version}-%{release}
 
 %description filesystem
 %{summary}.
@@ -241,15 +238,6 @@ Recommends:     %{name}-va-drivers%{?_isa}
 %description dri-drivers
 %{summary}.
 
-%if 0%{?with_omx}
-%package omx-drivers
-Summary:        Mesa-based OMX drivers
-Requires:       %{name}-filesystem%{?_isa} = %{?epoch:%{epoch}:}%{version}-%{release}
-
-%description omx-drivers
-%{summary}.
-%endif
-
 %if 0%{?with_va}
 %package        va-drivers
 Summary:        Mesa-based VA-API video acceleration drivers
@@ -425,7 +413,6 @@ export MESON_PACKAGE_CACHE_DIR="%{cargo_registry}/"
   -Dgallium-drivers=swrast,virgl \
 %endif
   -Dgallium-vdpau=%{?with_vdpau:enabled}%{!?with_vdpau:disabled} \
-  -Dgallium-omx=%{?with_omx:bellagio}%{!?with_omx:disabled} \
   -Dgallium-va=%{?with_va:enabled}%{!?with_va:disabled} \
   -Dgallium-xa=%{?with_xa:enabled}%{!?with_xa:disabled} \
   -Dgallium-nine=%{?with_nine:true}%{!?with_nine:false} \
@@ -676,11 +663,6 @@ popd
 %{_libdir}/dri/zink_dri.so
 %endif
 
-%if 0%{?with_omx}
-%files omx-drivers
-%{_libdir}/bellagio/libomx_mesa.so
-%endif
-
 %if 0%{?with_va}
 %files va-drivers
 %{_libdir}/dri/nouveau_drv_video.so