mb/clevo/l140cu: add CMOS layout and defaults

Add CMOS layout and defaults files and enable CMOS options in Kconfig.

Test: changed loglevel setting, rebooted and checked the log.

Change-Id: Ia1a27818b2d12fb7578189e5748b8073c8f928e3
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46311
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/clevo/cml-u/Kconfig

@@ -9,6 +9,8 @@ config BOARD_SPECIFIC_OPTIONS
 	select HAVE_ACPI_TABLES
 	select HAVE_SMI_HANDLER
 	select HAVE_SPD_IN_CBFS
+	select HAVE_OPTION_TABLE
+	select HAVE_CMOS_DEFAULT
 	select INTEL_GMA_HAVE_VBT
 	select INTEL_LPSS_UART_FOR_CONSOLE
 	select MAINBOARD_HAS_LPC_TPM

src/mainboard/clevo/cml-u/cmos.default

@@ -0,0 +1,3 @@
+boot_option=Fallback
+debug_level=Debug
+power_on_after_fail=Disable

src/mainboard/clevo/cml-u/cmos.layout

@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+# -----------------------------------------------------------------
+entries
+
+# start-bit	length	config	config-ID	name
+0		120	r	0		reserved_memory
+
+# -----------------------------------------------------------------
+# RTC_BOOT_BYTE (coreboot hardcoded)
+384		  1	e	4		boot_option
+388		  4	h	0		reboot_counter
+
+# -----------------------------------------------------------------
+# coreboot config options: console
+395		  4    e	6		debug_level
+
+# -----------------------------------------------------------------
+# coreboot config options: cpu
+400		  1    e	2		hyper_threading
+
+# -----------------------------------------------------------------
+# coreboot config options: southbridge
+410		  2	e	7		power_on_after_fail
+
+# -----------------------------------------------------------------
+# vboot nv area
+800		128	r	0		vbnv
+
+# -----------------------------------------------------------------
+# coreboot config options: check sums
+984		 16	h	0		check_sum
+
+# -----------------------------------------------------------------
+
+enumerations
+
+#ID value   text
+1     0     Disable
+1     1     Enable
+2     0     Enable
+2     1     Disable
+4     0     Fallback
+4     1     Normal
+6     0     Emergency
+6     1     Alert
+6     2     Critical
+6     3     Error
+6     4     Warning
+6     5     Notice
+6     6     Info
+6     7     Debug
+6     8     Spew
+7     0     Disable
+7     1     Enable
+7     2     Keep
+
+# -----------------------------------------------------------------
+checksums
+
+checksum 392 799 984