package/alsa-lib: add BR2_PACKAGE_ALSA_LIB_UCM

ucm needs mixer since version 1.2.1 and
https://github.com/alsa-project/alsa-lib/commit/5c88b183718ce3df11bc4753c76d95f3e9de6c7e

So add a BR2_PACKAGE_ALSA_LIB_UCM option that selects
BR2_PACKAGE_ALSA_LIB_MIXER and selects this new option in
BR2_PACKAGE_ALSA_UTILS_ALSAUCM to avoid a build failure

Fixes:
 - http://autobuild.buildroot.org/results/aaa615d4e38d100bb9001ecdf7357e755ef42a87

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/alsa-lib/Config.in

@@ -66,6 +66,11 @@ config BR2_PACKAGE_ALSA_LIB_SEQ
 	bool "seq"
 	default y
 
+config BR2_PACKAGE_ALSA_LIB_UCM
+	bool "ucm"
+	default y
+	select BR2_PACKAGE_ALSA_LIB_MIXER
+
 config BR2_PACKAGE_ALSA_LIB_ALISP
 	bool "alisp"
 	default y

package/alsa-lib/alsa-lib.mk

@@ -45,6 +45,9 @@ endif
 ifneq ($(BR2_PACKAGE_ALSA_LIB_SEQ),y)
 ALSA_LIB_CONF_OPTS += --disable-seq
 endif
+ifneq ($(BR2_PACKAGE_ALSA_LIB_UCM),y)
+ALSA_LIB_CONF_OPTS += --disable-ucm
+endif
 ifneq ($(BR2_PACKAGE_ALSA_LIB_ALISP),y)
 ALSA_LIB_CONF_OPTS += --disable-alisp
 endif

package/alsa-utils/Config.in

@@ -41,6 +41,7 @@ comment "alsamixer needs a toolchain w/ wchar"
 
 config BR2_PACKAGE_ALSA_UTILS_ALSAUCM
 	bool "alsaucm"
+	select BR2_PACKAGE_ALSA_LIB_UCM
 
 config BR2_PACKAGE_ALSA_UTILS_ALSATPLG
 	bool "alsatplg"