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/dragonboard820c_defconfig b/configs/dragonboard820c_defconfig
index ec4a5b9..1662f68 100644
--- a/configs/dragonboard820c_defconfig
+++ b/configs/dragonboard820c_defconfig
@@ -6,6 +6,7 @@
 CONFIG_IDENT_STRING="\nQualcomm-DragonBoard 820C"
 CONFIG_DEFAULT_DEVICE_TREE="dragonboard820c"
 CONFIG_DISTRO_DEFAULTS=y
+CONFIG_NR_DRAM_BANKS=2
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyMSM0,115200n8"
 # CONFIG_USE_BOOTCOMMAND is not set