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/uniphier_v7_defconfig b/configs/uniphier_v7_defconfig
index ce7bcfc..6c0a283 100644
--- a/configs/uniphier_v7_defconfig
+++ b/configs/uniphier_v7_defconfig
@@ -7,6 +7,7 @@
 CONFIG_SPL=y
 CONFIG_MICRO_SUPPORT_CARD=y
 CONFIG_DEFAULT_DEVICE_TREE="uniphier-pxs2-vodka"
+CONFIG_NR_DRAM_BANKS=3
 # CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
 CONFIG_LOGLEVEL=6
 CONFIG_SPL_NAND_SUPPORT=y