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/sfr_nb4-ser_ram_defconfig b/configs/sfr_nb4-ser_ram_defconfig
index f2031df..cfbb3f5 100644
--- a/configs/sfr_nb4-ser_ram_defconfig
+++ b/configs/sfr_nb4-ser_ram_defconfig
@@ -7,6 +7,7 @@
 # CONFIG_MIPS_BOOT_ENV_LEGACY is not set
 CONFIG_MIPS_BOOT_FDT=y
 CONFIG_DEFAULT_DEVICE_TREE="sfr,nb4-ser"
+CONFIG_NR_DRAM_BANKS=1
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_DISPLAY_CPUINFO=y