ppc4xx: Kilauea: Fix SDRAM init in NAND booting version

DDR2 Auto-calibration needs to be disabled on the NAND booting PPC4xx
targets. Otherwise the configured fixed init values for some DDR2
controller registers (e.g. RQDC) are not initialized at all resulting
in a non working SDRAM.

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

include/configs/kilauea.h

@@ -236,9 +236,11 @@
  *
  * DDR Autocalibration Method_B is the default.
  */
+#if !defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
 #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)