classes-utils: Whitespace fixes

Four spaces for python code.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/classes/obmc-phosphor-utils.bbclass b/classes/obmc-phosphor-utils.bbclass
index 4f55629..44ca7ad 100644
--- a/classes/obmc-phosphor-utils.bbclass
+++ b/classes/obmc-phosphor-utils.bbclass
@@ -2,13 +2,16 @@
 
 inherit utils
 
+
 def df_enabled(feature, value, d):
-        return base_contains("DISTRO_FEATURES", feature, value, "", d)
+    return base_contains("DISTRO_FEATURES", feature, value, "", d)
+
 
 def mf_enabled(feature, value, d):
-        return base_contains("MACHINE_FEATURES", feature, value, "", d)
+    return base_contains("MACHINE_FEATURES", feature, value, "", d)
+
 
 def cf_enabled(feature, value, d):
-        return value if df_enabled(feature, value, d) \
-                and mf_enabled(feature, value, d) \
-                        else ""
+    return value if df_enabled(feature, value, d) \
+        and mf_enabled(feature, value, d) \
+            else ""