Use the accidentally-dropped efi_os_dir

Resolves: RHEL-152095

fwupd.spec

@@ -59,7 +59,7 @@
 Summary:   Firmware update daemon
 Name:      fwupd
 Version:   2.0.19
-Release:   1%{?dist}
+Release:   2%{?dist}
 License:   LGPL-2.1-or-later
 URL:       https://github.com/fwupd/fwupd
 Source0:   http://people.freedesktop.org/~hughsient/releases/%{name}-%{version}.tar.xz
@@ -295,6 +295,10 @@ cd -
 %else
     -Dplugin_flashrom=disabled \
 %endif
+%if 0%{?have_uefi}
+    -Defi_binary=false \
+    -Defi_os_dir=%{efi_vendor} \
+%endif
 %if 0%{?have_modem_manager}
     -Dplugin_modem_manager=enabled \
 %else