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/work_92105_defconfig b/configs/work_92105_defconfig
index 55e790f..7504077 100644
--- a/configs/work_92105_defconfig
+++ b/configs/work_92105_defconfig
@@ -7,6 +7,7 @@
 CONFIG_SPL=y
 CONFIG_CMD_HD44760=y
 CONFIG_CMD_MAX6957=y
+CONFIG_NR_DRAM_BANKS=2
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyS2,115200n8"