package/alsa-plugins: add optional dependency on pulseaudio

Build alsa-plugins with pulseaudio support if it is selected in
menuconfig.

Signed-off-by: Guillaume GC. Chaye <guillaume.chaye@zeetim.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/alsa-plugins/alsa-plugins.mk

@@ -14,12 +14,18 @@ ALSA_PLUGINS_DEPENDENCIES = host-pkgconf alsa-lib
 ALSA_PLUGINS_CONF_OPTS = \
 	--disable-jack \
 	--disable-usbstream \
-	--disable-pulseaudio \
 	--disable-libav \
 	--disable-maemo-plugin \
 	--disable-maemo-resource-manager \
 	--with-speex=no
 
+ifeq ($(BR2_PACKAGE_PULSEAUDIO),y)
+ALSA_PLUGINS_DEPENDENCIES += pulseaudio
+ALSA_PLUGINS_CONF_OPTS += --enable-pulseaudio
+else
+ALSA_PLUGINS_CONF_OPTS += --disable-pulseaudio
+endif
+
 ifeq ($(BR2_PACKAGE_ALSA_UTILS),y)
 ALSA_PLUGINS_DEPENDENCIES += alsa-utils
 endif