package/libopenssl: use consistent logic

The patch expresses the same condition in positive logic, consistent
with what has been coded in other parts of the module and generally
in Buildroot.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit c2761b52663155e9247dc23350f7159493837d0e)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libopenssl/libopenssl.mk

@@ -164,7 +164,7 @@ endef
 LIBOPENSSL_POST_INSTALL_TARGET_HOOKS += LIBOPENSSL_REMOVE_BIN
 endif
 
-ifneq ($(BR2_PACKAGE_LIBOPENSSL_ENGINES),y)
+ifeq ($(BR2_PACKAGE_LIBOPENSSL_ENGINES),)
 define LIBOPENSSL_REMOVE_LIBOPENSSL_ENGINES
 	$(RM) -rf $(TARGET_DIR)/usr/lib/engines-3
 endef