x86: Change coreboot default build configuration to QEMU

QEMU is much easier for us test booting U-Boot as a coreboot payload
than having a real board like chromebook_link.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>

board/coreboot/coreboot/Kconfig

@@ -16,21 +16,21 @@ comment "coreboot-specific options"
 
 config SYS_CONFIG_NAME
 	string "Board configuration file"
-	default "chromebook_link"
+	default "qemu-x86"
 	help
 	  This option selects the board configuration file in include/configs/
 	  directory to be used to build U-Boot for coreboot.
 
 config DEFAULT_DEVICE_TREE
 	string "Board Device Tree Source (dts) file"
-	default "chromebook_link"
+	default "qemu-x86"
 	help
 	  This option selects the board Device Tree Source (dts) file in
 	  arch/x86/dts/ directory to be used to build U-Boot for coreboot.
 
 config SYS_CAR_ADDR
 	hex "Board specific Cache-As-RAM (CAR) address"
-	default 0x19200000
+	default 0x01920000
 	help
 	  This option specifies the board specific Cache-As-RAM (CAR) address.
 

configs/coreboot-x86_defconfig

@@ -4,3 +4,4 @@ CONFIG_TARGET_COREBOOT=y
 CONFIG_CMD_NET=y
 CONFIG_OF_CONTROL=y
 CONFIG_DM_PCI=y
+CONFIG_TSC_CALIBRATION_BYPASS=y