packagegroup-dey-audio: remove some alsa-utils dependences

Alsa-utils tools once compiled are distributed between a bunch of
different subpackages. Then 'alsa-utils' as a final package is just
a meta-package that depends on all of the different subpackages.

So instead of RDEPEND'ing on the alsa-utils metapackage, depend on just
a few of the alsa-utils subpackages.

This removes for example the 'alsa-utils-alsaconf' package that was
bringing bash into our rootfs.

Removing bash solves the problem of the lines-not-wrapped on the serial
console because now we use busybox' shell in the serial console.

https://jira.digi.com/browse/DEL-610

Signed-off-by: Javier Viguera <javier.viguera@digi.com>

meta-digi-dey/recipes-multimedia/packagegroups/packagegroup-dey-audio.bb

@@ -10,11 +10,19 @@ PR = "r0"
 
 inherit packagegroup
 
+ALSA_UTILS_PKGS = " \
+    alsa-utils-alsactl \
+    alsa-utils-alsamixer \
+    alsa-utils-amixer \
+    alsa-utils-aplay \
+    alsa-utils-speakertest \
+"
+
 RDEPENDS_${PN} = "\
     alsa-lib \
-    alsa-utils \
     alsa-state \
     alsa-states \
+    ${ALSA_UTILS_PKGS} \
 "
 
 RDEPENDS_${PN}_append_mx5 = " imx-audio"