package/softether: fix static build with openssl and atomic

Don't pass --with-openssl option to force softether to use pkg-config
(see autotools/ax_check_openssl.m4).

pkg-config will find openssl dependencies such as lz or latomic

Fix static build on sparc v8 (even if there is no autobuilder failures
yet)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 5472d80405b7edd61ad0eec3a6b2f45e8dd8f8e9)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/softether/softether.mk

@@ -8,7 +8,7 @@ SOFTETHER_VERSION = v4.28-9669-beta
 SOFTETHER_SITE = $(call github,SoftEtherVPN,SoftEtherVPN_stable,$(SOFTETHER_VERSION))
 SOFTETHER_LICENSE = GPL-2.0
 SOFTETHER_LICENSE_FILES = LICENSE
-SOFTETHER_DEPENDENCIES = host-softether libopenssl readline
+SOFTETHER_DEPENDENCIES = host-pkgconf host-softether libopenssl readline
 SOFTETHER_AUTORECONF = YES
 
 ifeq ($(BR2_ENABLE_LOCALE),)
@@ -16,14 +16,7 @@ SOFTETHER_DEPENDENCIES += libiconv
 SOFTETHER_CONF_ENV = LIBS+=" -liconv"
 endif
 
-ifeq ($(BR2_STATIC_LIBS),y)
-# openssl needs zlib
-SOFTETHER_CONF_ENV += LIBS+=" -lz"
-endif
-
-SOFTETHER_CONF_OPTS = \
-	--with-openssl="$(STAGING_DIR)/usr" \
-	--with-zlib="$(STAGING_DIR)/usr"
+SOFTETHER_CONF_OPTS = --with-zlib="$(STAGING_DIR)/usr"
 
 # host-libiconv does not exist, therefore we need this extra line
 HOST_SOFTETHER_DEPENDENCIES = host-pkgconf host-libopenssl host-readline