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/xilinx_zynqmp_mini_nand_defconfig b/configs/xilinx_zynqmp_mini_nand_defconfig
index 3117770..afdfcd5 100644
--- a/configs/xilinx_zynqmp_mini_nand_defconfig
+++ b/configs/xilinx_zynqmp_mini_nand_defconfig
@@ -6,6 +6,7 @@
 # CONFIG_CMD_ZYNQMP is not set
 CONFIG_DEFAULT_DEVICE_TREE="zynqmp-mini-nand"
 CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_NR_DRAM_BANKS=1
 CONFIG_FIT=y
 CONFIG_BOOTDELAY=-1
 CONFIG_SUPPORT_RAW_INITRD=y