ppc4xx: Disable DDR2 autocalibration on Kilauea for now

Since the new autocalibration still has some problems on some Kilauea
boards with 200MHz DDR2 frequency we disable the autocalibration and
use the hardcoded values as done before. This seems to work reliably
on all known DDR2 frequencies.

After the autocalibration issue is fixed we will enable it again.

Signed-off-by: Stefan Roese <sr@denx.de>

include/configs/kilauea.h

@@ -235,9 +235,16 @@
  *
  * DDR Autocalibration Method_B is the default.
  */
+#if 0
+/*
+ * Needs FIX!!!
+ * Disable autocalibration for now, because of the unresolved problem
+ * with kilauea board using 200MHz PLB/DDR2 frequency
+ */
 #define	CONFIG_PPC4xx_DDR_AUTOCALIBRATION	/* IBM DDR autocalibration */
 #define	DEBUG_PPC4xx_DDR_AUTOCALIBRATION	/* dynamic DDR autocal debug */
 #undef	CONFIG_PPC4xx_DDR_METHOD_A
+#endif
 
 #define	CONFIG_SYS_SDRAM0_MB0CF_BASE	((  0 << 20) + CONFIG_SYS_SDRAM_BASE)