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/highbank_defconfig b/configs/highbank_defconfig
index 6375034..661bef8 100644
--- a/configs/highbank_defconfig
+++ b/configs/highbank_defconfig
@@ -3,6 +3,7 @@
 CONFIG_ARCH_HIGHBANK=y
 CONFIG_SYS_TEXT_BASE=0x00008000
 CONFIG_DISTRO_DEFAULTS=y
+CONFIG_NR_DRAM_BANKS=0
 CONFIG_FIT=y
 CONFIG_OF_BOARD_SETUP=y
 # CONFIG_USE_BOOTCOMMAND is not set