test: unit: defconfig: Skip root login checks for all boot configs

Also, hoist the whitelist check up one level, so that we can report
which configs we are exempting, and which ones we are actually
checking.

test/case/repo/defconfig.sh

@@ -5,44 +5,39 @@ CONFIGS="$SCRIPT_PATH/../../../configs"
 
 whitelist()
 {
-    nm=$(basename "$1")
-    case $nm in
-	cn9130_crb_boot_defconfig | fireant_boot_defconfig)
+    case "$1" in
+	*_boot_defconfig)
 	    return 0
 	    ;;
-	*)
-	    return 1
-	    ;;
     esac
+
+    return 1
 }
 
 # Check for disabled root login
 disabled_root_login()
 {
-    txt="# BR2_TARGET_ENABLE_ROOT_LOGIN is not set"
-    fn=$(realpath "$1")
-
-    if ! grep -q "$txt" "$fn"; then
-	if ! whitelist "$fn"; then
-	    echo "Missing '$txt' in $fn!"
-	    return 1
-	fi
-    fi
+    grep -q "# BR2_TARGET_ENABLE_ROOT_LOGIN is not set" "$1"
 }
 
 # For all defconfigs
 check()
 {
-    total=$#
-    num=1
+    local total=$#
+    local num=1
+    local base=
 
     echo "1..$total"
     for defconfig in "$@"; do
-	fn=$(basename "$defconfig")
+	base=$(basename "$defconfig")
 	if disabled_root_login "$defconfig"; then
-	    echo "ok $num - $fn"
+	    echo "ok $num - $base disables root logins"
 	else
-	    echo "not ok $num - $fn has not disabled root login"
+	    if whitelist "$base"; then
+		echo "ok $num - $base is exempted # skip"
+	    else
+		echo "not ok $num - $base has not disabled root login"
+	    fi
 	fi
 	num=$((num + 1))
     done