package/libp11: drop libressl support

libressl dropped engine support since version 3.8.1 resulting in the
following build failure since bump of libressl to version 3.8.2 in
commit 21eca49ed5110872407b76ab9337d2877c4cda24:

eng_front.c: In function 'IMPLEMENT_DYNAMIC_CHECK_FN':
eng_front.c:262:1: error: expected declaration specifiers before 'IMPLEMENT_DYNAMIC_BIND_FN'
  262 | IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/389ed112f082a4917f777f3e236211059c4c6d6e

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libp11/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_LIBP11
 	depends on !BR2_STATIC_LIBS # dlopen
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_PACKAGE_OPENSSL
+	select BR2_PACKAGE_OPENSSL_FORCE_LIBOPENSSL
 	help
 	  OpenSSL engine for PKCS#11 modules. Part of the OpenSC
 	  project.

package/libp11/libp11.mk

@@ -11,16 +11,10 @@ LIBP11_INSTALL_STAGING = YES
 LIBP11_LICENSE = LGPL-2.1+
 LIBP11_LICENSE_FILES = COPYING
 
-ifeq ($(BR2_PACKAGE_LIBOPENSSL),y)
-LIBP11_ENGINESDIR = enginesdir
-else ifeq ($(BR2_PACKAGE_LIBRESSL),y)
-LIBP11_ENGINESDIR = libdir
-endif
-
 # pkg-config returns a libcrypto enginesdir prefixed with the sysroot,
 # so let's rip it out.
 LIBP11_CONF_OPTS = \
-	--with-enginesdir=`$(PKG_CONFIG_HOST_BINARY) --variable $(LIBP11_ENGINESDIR) libcrypto | xargs readlink -f | sed 's%^$(STAGING_DIR)%%'`
+	--with-enginesdir=`$(PKG_CONFIG_HOST_BINARY) --variable enginesdir libcrypto | xargs readlink -f | sed 's%^$(STAGING_DIR)%%'`
 
 ifeq ($(BR2_PACKAGE_P11_KIT),y)
 LIBP11_CONF_OPTS += --with-pkcs11-module=/usr/lib/p11-kit-proxy.so