Revert "package/rtty: remove unnecessary cmake options"

This reverts commit 7f169e6bc3.

As pointed out by Yann E. Morin, we really want to explicitly disable
crypto backends, otherwise they will get automatically re-enabled if
one of the dependencies is found:

    elseif(OPENSSL_FOUND)
        set(RTTY_USE_OPENSSL ON)
    elseif(WOLFSSL_FOUND)
        set(RTTY_USE_WOLFSSL ON)
    elseif(MBEDTLS_FOUND)
        set(RTTY_USE_MBEDTLS ON)

But as usual, dependencies may incorrectly be found, so we want to
explicitly disable.

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

package/rtty/rtty.mk

@@ -12,13 +12,25 @@ RTTY_DEPENDENCIES = libev
 
 ifeq ($(BR2_PACKAGE_MBEDTLS),y)
 RTTY_DEPENDENCIES += mbedtls
-RTTY_CONF_OPTS += -DRTTY_USE_MBEDTLS=ON
+RTTY_CONF_OPTS += \
+	-DRTTY_SSL_SUPPORT=ON \
+	-DRTTY_USE_MBEDTLS=ON \
+	-DRTTY_USE_OPENSSL=OFF \
+	-DRTTY_USE_WOLFSSL=OFF
 else ifeq ($(BR2_PACKAGE_OPENSSL),y)
 RTTY_DEPENDENCIES += host-pkgconf openssl
-RTTY_CONF_OPTS += -DRTTY_USE_OPENSSL=ON
+RTTY_CONF_OPTS += \
+	-DRTTY_SSL_SUPPORT=ON \
+	-DRTTY_USE_MBEDTLS=OFF \
+	-DRTTY_USE_OPENSSL=ON \
+	-DRTTY_USE_WOLFSSL=OFF
 else ifeq ($(BR2_PACKAGE_WOLFSSL),y)
 RTTY_DEPENDENCIES += wolfssl
-RTTY_CONF_OPTS += -DRTTY_USE_WOLFSSL=ON
+RTTY_CONF_OPTS += \
+	-DRTTY_SSL_SUPPORT=ON \
+	-DRTTY_USE_MBEDTLS=OFF \
+	-DRTTY_USE_OPENSSL=OFF \
+	-DRTTY_USE_WOLFSSL=ON
 else
 RTTY_CONF_OPTS += -DRTTY_SSL_SUPPORT=OFF
 endif