arm, at91, mpddrc: fix typo in ddr2_init()

use the configure value for computing the ba_off value
not the value from the cr register. This leaded in a
wrong ram configuration on the upcoming corvus spl board
support.
Signed-off-by: NHeiko Schocher <hs@denx.de>
Reviewed-by: NAndreas Bießmann <andreas.devel@googlemail.com>
Signed-off-by: NAndreas Bießmann <andreas.devel@googlemail.com>

arch/arm/cpu/at91-common/mpddrc.c

@@ -26,7 +26,7 @@ int ddr2_init(const unsigned int ram_address,
 	/* Compute bank offset according to NC in configuration register */
 	ba_off = (mpddr_value->cr & ATMEL_MPDDRC_CR_NC_MASK) + 9;
 	if (!(mpddr_value->cr & ATMEL_MPDDRC_CR_DECOD_INTERLEAVED))
-		ba_off += ((mpddr->cr & ATMEL_MPDDRC_CR_NR_MASK) >> 2) + 11;
+		ba_off += ((mpddr_value->cr & ATMEL_MPDDRC_CR_NR_MASK) >> 2) + 11;
 
 	ba_off += (mpddr_value->md & ATMEL_MPDDRC_MD_DBW_MASK) ? 1 : 2;