ppc / layerscape: Clean up CONFIG_SYS_CCSR_DO_NOT_RELOCATE usage

A number of PowerPC platforms define this, for SPL.  To move this to
Kconfig, it needs to be CONFIG_SPL_SYS_CCSR_DO_NOT_RELOCATE, so use
CONFIG_IS_ENABLED() to check for usage.  A number of layerscape
platforms bring this logic from PowerPC, but only need a small part of
it, for the fman driver.  Remove their unused portion at least.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/mpc85xx.h b/include/mpc85xx.h
index 2c69a60..053b68a 100644
--- a/include/mpc85xx.h
+++ b/include/mpc85xx.h
@@ -26,7 +26,7 @@
  * Define default values for some CCSR macros to make header files cleaner*
  *
  * To completely disable CCSR relocation in a board header file, define
- * CONFIG_SYS_CCSR_DO_NOT_RELOCATE.  This will force CONFIG_SYS_CCSRBAR_PHYS
+ * CONFIG_SPL_SYS_CCSR_DO_NOT_RELOCATE.  This will force CONFIG_SYS_CCSRBAR_PHYS
  * to a value that is the same as CONFIG_SYS_CCSRBAR.
  */
 
@@ -35,7 +35,7 @@
 CONFIG_SYS_CCSRBAR_PHYS_LOW and/or CONFIG_SYS_CCSRBAR_PHYS_HIGH instead."
 #endif
 
-#ifdef CONFIG_SYS_CCSR_DO_NOT_RELOCATE
+#if CONFIG_IS_ENABLED(SYS_CCSR_DO_NOT_RELOCATE)
 #undef CONFIG_SYS_CCSRBAR_PHYS_HIGH
 #undef CONFIG_SYS_CCSRBAR_PHYS_LOW
 #define CONFIG_SYS_CCSRBAR_PHYS_HIGH	0