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: NBin Meng <bmeng.cn@gmail.com>
Acked-by: NSimon Glass <sjg@chromium.org>

arch/x86/dts/galileo.dts

@@ -132,6 +132,10 @@
 			reg = <0>;
 			compatible = "winbond,w25q64", "spi-flash";
 			memory-map = <0xff800000 0x00800000>;
+			rw-mrc-cache {
+				label = "rw-mrc-cache";
+				reg = <0x00010000 0x00010000>;
+			};
 		};
 	};
 

configs/galileo_defconfig

@@ -2,6 +2,7 @@ CONFIG_X86=y
 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