Don't enable RDP support in ELN/RHEL 9+

FreeRDP is built without server support in RHEL and ELN so we should disable
the RDP there. Partial backport of a RHEL 9 change from
https://gitlab.com/redhat/centos-stream/rpms/gnome-remote-desktop/-/commit/9a9f01d1

gnome-remote-desktop.spec

@@ -2,9 +2,16 @@
 
 %global tarball_version %%(echo %{version} | tr '~' '.')
 
+# In RHEL/ELN FreeRDP is built without server support
+%if 0%{?rhel} >= 9
+%global enable_rdp 0
+%else
+%global enable_rdp 1
+%endif
+
 Name:           gnome-remote-desktop
 Version:        43~alpha
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        GNOME Remote Desktop screen share service
 
 License:        GPLv2+
@@ -21,8 +28,11 @@ BuildRequires:  systemd-rpm-macros
 BuildRequires:  pkgconfig(cairo)
 BuildRequires:  pkgconfig(epoxy)
 BuildRequires:  pkgconfig(ffnvcodec)
+%if 0%{?enable_rdp}
 BuildRequires:  pkgconfig(freerdp2)
 BuildRequires:  pkgconfig(fuse3)
+BuildRequires:  pkgconfig(winpr2)
+%endif
 BuildRequires:  pkgconfig(gbm)
 BuildRequires:  pkgconfig(glib-2.0) >= 2.68
 BuildRequires:  pkgconfig(gio-unix-2.0)
@@ -34,7 +44,6 @@ BuildRequires:  pkgconfig(libpipewire-0.3)
 BuildRequires:  pkgconfig(libsecret-1)
 BuildRequires:  pkgconfig(libvncserver) >= 0.9.11-7
 BuildRequires:  pkgconfig(systemd)
-BuildRequires:  pkgconfig(winpr2)
 BuildRequires:  pkgconfig(xkbcommon)
 
 Requires:       pipewire%{?_isa} >= 0.3.0
@@ -52,7 +61,11 @@ GNOME desktop environment.
 
 %build
 %meson \
+%if 0%{?enable_rdp}
     -Drdp=true \
+%else
+    -Drdp=false \
+%endif
     -Dsystemd=true \
     -Dvnc=true
 %meson_build
@@ -84,11 +97,17 @@ GNOME desktop environment.
 %{_userunitdir}/%{systemd_unit}
 %{_datadir}/glib-2.0/schemas/org.gnome.desktop.remote-desktop.gschema.xml
 %{_datadir}/glib-2.0/schemas/org.gnome.desktop.remote-desktop.enums.xml
+%if 0%{?enable_rdp}
 %{_datadir}/gnome-remote-desktop/
+%endif
 %{_mandir}/man1/grdctl.1*
 
 
 %changelog
+* Fri Jul 29 2022 Tomas Popela <tpopela@redhat.com> - 43~alpha-2
+- FreeRDP is built without server support in RHEL and ELN so we should disable
+  the RDP there
+
 * Thu Jul 28 2022 Jonas Ådahl <jadahl@redhat.com> - 43~alpha
 - Update to 43.alpha