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/CHIP_defconfig b/configs/CHIP_defconfig
index c122944..b674b6c 100644
--- a/configs/CHIP_defconfig
+++ b/configs/CHIP_defconfig
@@ -6,6 +6,7 @@
 CONFIG_USB0_VBUS_PIN="PB10"
 CONFIG_VIDEO_COMPOSITE=y
 CONFIG_DEFAULT_DEVICE_TREE="sun5i-r8-chip"
+CONFIG_NR_DRAM_BANKS=1
 CONFIG_SPL_I2C_SUPPORT=y
 CONFIG_CMD_DFU=y
 CONFIG_CMD_USB_MASS_STORAGE=y