oniro-linux.conf: Specify preferred version of pyyaml

Homeassistant requires pyyaml == 5.3 while oe layer provides newer
version. Specifying preferred older version to fix the broken
dependencies.

Fixes: https://booting.oniroproject.org/distro/oniro/-/issues/187


Signed-off-by: Pavel Zhukov <pavel.zhukov@huawei.com>

meta-oniro-core/conf/distro/oniro-linux.conf

@@ -111,6 +111,9 @@ PREFERRED_PROVIDER_virtual/kernel_qemuarm64 = "linux-oniro"
 PREFERRED_PROVIDER_virtual/kernel_qemux86 = "linux-oniro"
 PREFERRED_PROVIDER_virtual/kernel_qemux86-64 = "linux-oniro"
 
+# https://booting.oniroproject.org/distro/oniro/-/issues/187
+PREFERRED_VERSION_python3-pyyaml = "5.3"
+
 # Default to enabling serial debug console on RaspberryPi
 ENABLE_UART ?= "1"