spl: allow using nand base without standard nand driver

This patch removes the dependency to SPL_NAND_DRIVERS for SPL_NAND_BASE to
allow minimal spl nand driver to use nand base for probing NAND chips.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 931619c..908d7d1 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -884,7 +884,7 @@
 	  expose the cmd_ctrl() interface.
 
 config SPL_NAND_BASE
-	depends on SPL_NAND_DRIVERS
+	depends on SPL_NAND_SUPPORT
 	bool "Use Base NAND Driver"
 	help
 	  Include nand_base.c in the SPL.