irqbalance: ui needs ncurses

Fixes:
 - http://autobuild.buildroot.org/results/227543e9760dedeeb4360de49e09baebed98f894

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

package/irqbalance/irqbalance.mk

@@ -21,6 +21,9 @@ endif
 
 ifeq ($(BR2_PACKAGE_NCURSES_WCHAR),y)
 IRQBALANCE_DEPENDENCIES += ncurses
+IRQBALANCE_CONF_OPTS += --with-irqbalance-ui
+else
+IRQBALANCE_CONF_OPTS += --without-irqbalance-ui
 endif
 
 ifeq ($(BR2_PACKAGE_NUMACTL),y)