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/firefly-rk3288_defconfig b/configs/firefly-rk3288_defconfig
index 4435350..7114587 100644
--- a/configs/firefly-rk3288_defconfig
+++ b/configs/firefly-rk3288_defconfig
@@ -10,6 +10,7 @@
 CONFIG_SPL_STACK_R_ADDR=0x80000
 CONFIG_DEFAULT_DEVICE_TREE="rk3288-firefly"
 CONFIG_DEBUG_UART=y
+CONFIG_NR_DRAM_BANKS=1
 # CONFIG_ANDROID_BOOT_IMAGE is not set
 CONFIG_SILENT_CONSOLE=y
 CONFIG_DEFAULT_FDT_FILE="rk3288-firefly.dtb"