85xx boards: Rename CONFIG_DDR_DLL to CONFIG_SYS_FSL_ERRATUM_DDR_MSYNC_IN

This config option is for an erratum workaround; rename it to be more
clear.  Also, drop it from config files don't need it and were
undefining it.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/SBC8540.h b/include/configs/SBC8540.h
index fd9bacc..72559c0 100644
--- a/include/configs/SBC8540.h
+++ b/include/configs/SBC8540.h
@@ -118,7 +118,7 @@
 #undef  CONFIG_DDR_SPD
 
 #if defined(CONFIG_MPC85xx_REV1)
-  #define CONFIG_DDR_DLL			/* possible DLL fix needed	*/
+#define CONFIG_SYS_FSL_ERRATUM_DDR_MSYNC_IN	/* possible DLL fix needed */
 #endif
 
 #undef  CONFIG_DDR_ECC			    /* only for ECC DDR module */