package/mtr: use ncurses option

Use --with-ncurses and --without-ncurses options which are available
since version 0.88 and
https://github.com/traviscross/mtr/commit/4e2a948a167d9b8a0a63b46a423d4ae1519ad759

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
(cherry picked from commit edb65b4e6d7ecfec1bf732b6a4a047e155b22dac)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/mtr/mtr.mk

@@ -10,10 +10,16 @@ MTR_AUTORECONF = YES
 MTR_CONF_OPTS = --without-gtk
 MTR_DEPENDENCIES = \
 	host-pkgconf \
-	$(if $(BR2_PACKAGE_LIBCAP),libcap) \
-	$(if $(BR2_PACKAGE_NCURSES),ncurses)
+	$(if $(BR2_PACKAGE_LIBCAP),libcap)
 MTR_LICENSE = GPL-2.0
 MTR_LICENSE_FILES = COPYING
 MTR_SELINUX_MODULES = netutils
 
+ifeq ($(BR2_PACKAGE_NCURSES),y)
+MTR_CONF_OPTS += --with-ncurses
+MTR_DEPENDENCIES += ncurses
+else
+MTR_CONF_OPTS += --without-ncurses
+endif
+
 $(eval $(autotools-package))