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/bcm958300k-ns_defconfig b/configs/bcm958300k-ns_defconfig
index 7af8104..fd0da02 100644
--- a/configs/bcm958300k-ns_defconfig
+++ b/configs/bcm958300k-ns_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARM=y
 CONFIG_TARGET_BCMCYGNUS=y
 CONFIG_SYS_TEXT_BASE=0x61000000
+CONFIG_NR_DRAM_BANKS=1
 CONFIG_SYS_EXTRA_OPTIONS="SYS_SDRAM_SIZE=0x40000000,ARMV7_NONSEC"
 CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_CPUINFO is not set