iop: config: Use OpenSSL instead of WolfSSL for libustream

In IOPSYSWRT, we use OpenSSL. Instead of shipping WolfSSL just for the
OpenWrt libustream library (which powers the uclient-fetch / wget
commands), make libustream use OpenSSL as well. This decreases security
maintenance and reduces overhead in image size and memory usage.

iop/config

@@ -219,3 +219,7 @@ CONFIG_TARGET_ROOTFS_TARGZ=y
 # Disable it. Most SoCs nowadays has HW random generators anyway.
 # CONFIG_PACKAGE_urandom-seed is not set
 # CONFIG_PACKAGE_urngd is not set
+
+# We use OpenSSL, no need to ship multiple TLS libraries
+CONFIG_PACKAGE_libustream-openssl=y
+# CONFIG_PACKAGE_libustream-wolfssl is not set