package/freeradius-server: enable default modules mschap and realm

"mschap" and "realm" are already part of default required
raddb modules(DEFAULT_MODULES in raddb/all.mk).

so removed them from disabled module list so that
radiusd.service can start without following errors:

- /etc/raddb/mods-enabled/mschap[11]: Failed to link to module 'rlm_mschap': /usr/lib/rlm_mschap.so
- /etc/raddb/mods-enabled/realm[21]: Failed to link to module 'rlm_realm': /usr/lib/rlm_realm.so

Signed-off-by: Kalpesh Panchal <kalpesh.panchal2@collins.com>
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit ce918125e126a8b75f2dce68e09205bb0e78add6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/freeradius-server/freeradius-server.mk

@@ -45,9 +45,7 @@ FREERADIUS_SERVER_CONF_OPTS += \
 FREERADIUS_SERVER_CONF_OPTS += \
 	--without-rlm_eap_ike \
 	--without-rlm_eap_tnc \
-	--without-rlm_mschap \
 	--without-rlm_perl \
-	--without-rlm_realm \
 	--without-rlm_sql_iodbc \
 	--without-rlm_sql_oracle \
 	--without-rlm_sql_freetds \