package/pipewire: alsa needs ucm

alsa unconditionally uses ucm since version 0.3.7 and
https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/1612f5e4d215bd5edf7d649d220b53ff1ed7c098
which will result in the following build failure since commit
a6d88d3ba5e30e11f4d726f341bc56c1be7c71c9:

../spa/plugins/alsa/acp/alsa-ucm.h:26:10: fatal error: alsa/use-case.h: No such file or directory
   26 | #include <alsa/use-case.h>
      |          ^~~~~~~~~~~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/ef53534daf84397b4e22392f2a6be2c335819ab5

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/pipewire/pipewire.mk

@@ -52,7 +52,7 @@ endif
 ifeq ($(BR2_PACKAGE_ALSA_LIB),y)
 PIPEWIRE_CONF_OPTS += -Dpipewire-alsa=enabled
 PIPEWIRE_DEPENDENCIES += alsa-lib
-ifeq ($(BR2_PACKAGE_HAS_UDEV),y)
+ifeq ($(BR2_PACKAGE_ALSA_LIB_UCM)$(BR2_PACKAGE_HAS_UDEV),yy)
 PIPEWIRE_CONF_OPTS += -Dalsa=enabled
 else
 PIPEWIRE_CONF_OPTS += -Dalsa=disabled