openldap: supports only the real OpenSSL, not LibreSSL

openldap will not build with LibreSSL without patches, so let's
support only OpenSSL.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/openldap/openldap.mk

@@ -12,8 +12,8 @@ OPENLDAP_LICENSE_FILES = LICENSE
 OPENLDAP_INSTALL_STAGING = YES
 OPENLDAP_DEPENDENCIES = host-pkgconf
 
-ifeq ($(BR2_PACKAGE_OPENSSL),y)
-OPENLDAP_TLS = openssl
+ifeq ($(BR2_PACKAGE_LIBOPENSSL),y)
+OPENLDAP_TLS = libopenssl
 OPENLDAP_DEPENDENCIES += openssl
 else ifeq ($(BR2_PACKAGE_GNUTLS),y)
 OPENLDAP_TLS = gnutls