Clean up the code according to codestyle:
(1) remove some C++ comments.
(2) remove trailing white space.
(3) remove trailing empty line.
(4) Indentation by table.
(5) remove {} in one line condition.
(6) add space before '(' in function call.
Remove some weird printf () output.
Add necessary comments.
Modified Makefile to support building in a separate directory.
diff --git a/Makefile b/Makefile
index 531a257..e781a67 100644
--- a/Makefile
+++ b/Makefile
@@ -1722,7 +1722,7 @@
 	@$(MKCONFIG) EVB64260 ppc 74xx_7xx evb64260
 
 mpc7448hpc2_config:  unconfig
-	@./mkconfig $(@:_config=) ppc 74xx_7xx mpc7448hpc2
+	@$(MKCONFIG) $(@:_config=) ppc 74xx_7xx mpc7448hpc2
 
 P3G4_config: unconfig
 	@$(MKCONFIG) $(@:_config=) ppc 74xx_7xx evb64260