[rdkb][common][bsp][Refactor BB files for kirkstone build pass]

[Description]
Refactor BB files for kirkstone build pass

[Release-log]

Change-Id: I35215ebae97282ea7c3439abe5a76d90e4322bf7
diff --git a/recipes-ccsp/ccsp/ccsp-eth-agent.bbappend b/recipes-ccsp/ccsp/ccsp-eth-agent.bbappend
index 38e81c4..a7ec1c0 100644
--- a/recipes-ccsp/ccsp/ccsp-eth-agent.bbappend
+++ b/recipes-ccsp/ccsp/ccsp-eth-agent.bbappend
@@ -2,7 +2,7 @@
 
 CFLAGS_aarch64_append = " -Werror=format-truncation=1 "
 
-EXTRA_OECONF_append  = " --with-ccsp-arch=arm"
+EXTRA_OECONF_append_dunfell  = " --with-ccsp-arch=arm"
 
 LDFLAGS_append =" \
     -lsyscfg \