linux-4.14.20: Select module to export coreboot CBMEM console

Build the module *memconsole_console*, enabling access to the coreboot
console messages stored in CBMEM (coreboot memory).

> This option enables the kernel to search for a firmware log in the
> coreboot table.  If found, this log is exported to userland in the
> file /sys/firmware/log.

Fixes: #616

linux-4.14.20-208.bee

@@ -761,6 +761,9 @@ mee_configure() {
 	CONFIG_RTC_CLASS=y
 	# CONFIG_RTC_INTF_PROC is not set
 	CONFIG_AMD_IOMMU=y
+	CONFIG_GOOGLE_FIRMWARE=y
+	CONFIG_GOOGLE_COREBOOT_TABLE_ACPI=m
+	CONFIG_GOOGLE_MEMCONSOLE_COREBOOT=m
 	CONFIG_EXT2_FS=y
 	CONFIG_EXT3_FS=y
 	CONFIG_EXT3_FS_POSIX_ACL=y