configs: Migrate CONFIG_NR_DRAM_BANKS

We have the following cases:
- CONFIG_NR_DRAM_BANKS was defined, migrate normally
- CONFIG_NR_DRAM_BANKS_MAX was defined and then used for
  CONFIG_NR_DRAM_BANKS after a check, just migrate it over now.
- CONFIG_NR_DRAM_BANKS was very oddly defined on p2771-0000-* (to 1024 +
  2), set this to 8.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/colibri_imx6_nospl_defconfig b/configs/colibri_imx6_nospl_defconfig
index aecc179..40ea60a 100644
--- a/configs/colibri_imx6_nospl_defconfig
+++ b/configs/colibri_imx6_nospl_defconfig
@@ -5,6 +5,7 @@
 CONFIG_TARGET_COLIBRI_IMX6=y
 CONFIG_CMD_HDMIDETECT=y
 CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_NR_DRAM_BANKS=1
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/toradex/colibri_imx6/colibri_imx6.cfg,MX6DL,DDR_MB=256"
 CONFIG_BOOTDELAY=1
 # CONFIG_CONSOLE_MUX is not set