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/sheevaplug_defconfig b/configs/sheevaplug_defconfig
index b965ff4..c3b388f 100644
--- a/configs/sheevaplug_defconfig
+++ b/configs/sheevaplug_defconfig
@@ -5,6 +5,7 @@
 CONFIG_TARGET_SHEEVAPLUG=y
 CONFIG_IDENT_STRING="\nMarvell-Sheevaplug"
 CONFIG_DEFAULT_DEVICE_TREE="kirkwood-sheevaplug"
+CONFIG_NR_DRAM_BANKS=2
 # CONFIG_SYS_MALLOC_F is not set
 CONFIG_BOOTDELAY=3
 # CONFIG_DISPLAY_BOARDINFO is not set