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/snow_defconfig b/configs/snow_defconfig
index 7440ab3..8fb31ba 100644
--- a/configs/snow_defconfig
+++ b/configs/snow_defconfig
@@ -12,6 +12,7 @@
 CONFIG_DEFAULT_DEVICE_TREE="exynos5250-snow"
 CONFIG_DEBUG_UART=y
 CONFIG_DISTRO_DEFAULTS=y
+CONFIG_NR_DRAM_BANKS=8
 CONFIG_FIT=y
 CONFIG_FIT_BEST_MATCH=y
 CONFIG_SILENT_CONSOLE=y