x86: galileo: Enable mrc cache

Now that we have added MRC cache on quark support codes,
enable it on Intel Galileo board.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/galileo_defconfig b/configs/galileo_defconfig
index d1808a5..1e1ce95 100644
--- a/configs/galileo_defconfig
+++ b/configs/galileo_defconfig
@@ -2,6 +2,7 @@
 CONFIG_VENDOR_INTEL=y
 CONFIG_DEFAULT_DEVICE_TREE="galileo"
 CONFIG_TARGET_GALILEO=y
+CONFIG_ENABLE_MRC_CACHE=y
 CONFIG_GENERATE_PIRQ_TABLE=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set