configs: aspeed: Enable CONFIG_SPI_DIRMAP

Enable CONFIG_SPI_DIRMAP on ASPEED platforms.

Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
diff --git a/configs/evb-ast2600_defconfig b/configs/evb-ast2600_defconfig
index ebe58d7..1981f89 100644
--- a/configs/evb-ast2600_defconfig
+++ b/configs/evb-ast2600_defconfig
@@ -110,6 +110,7 @@
 CONFIG_SYS_NS16550=y
 CONFIG_SPI=y
 CONFIG_DM_SPI=y
+CONFIG_SPI_DIRMAP=y
 CONFIG_SPI_ASPEED_SMC=y
 CONFIG_SYSRESET=y
 CONFIG_SPL_SYSRESET=y