package/libvirt: fix libvirtd option

Replace libvirtd by driver_libvirtd to avoid the following build failure
raised since the addition of the package in commit
ccfc90e1010e42e6529afae3a5ea8bf7226dabc1:

../output-1/build/libvirt-7.7.0/meson.build:1:0: ERROR: Unknown options: "libvirtd"

Fixes:
 - http://autobuild.buildroot.org/results/3a20db6cb39c0d91213adbe82934274659df43e7

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/libvirt/libvirt.mk

@@ -194,7 +194,7 @@ endif
 
 ifeq ($(BR2_PACKAGE_LIBVIRT_DAEMON),y)
 # Network is used by daemon, only
-LIBVIRT_CONF_OPTS += -Dlibvirtd=enabled -Ddriver_network=enabled
+LIBVIRT_CONF_OPTS += -Ddriver_libvirtd=enabled -Ddriver_network=enabled
 
 ifeq ($(BR2_PACKAGE_LIBSSH),y)
 LIBVIRT_CONF_OPTS += -Dlibssh=enabled
@@ -240,7 +240,7 @@ endif
 
 else # BR2_PACKAGE_LIBVIRT_DAEMON
 
-LIBVIRT_CONF_OPTS += -Dlibvirtd=disabled -Ddriver_network=disabled
+LIBVIRT_CONF_OPTS += -Ddriver_libvirtd=disabled -Ddriver_network=disabled
 
 endif