mb/system76/cml-u: Add System76 Galago Pro 4

Change-Id: I3dfa2ab430439d8dc71531b92aa7800db94d603b
Signed-off-by: Jeremy Soller <jeremy@system76.com>
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52034
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/system76/cml-u/cmos.layout

@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+entries
+
+0	384	r	0	reserved_memory
+
+# RTC_BOOT_BYTE (coreboot hardcoded)
+384	1	e	4	boot_option
+388	4	h	0	reboot_counter
+
+# RTC_CLK_ALTCENTURY
+400	8	r	0	century
+
+409	2	e	7	power_on_after_fail
+412	4	e	6	debug_level
+984	16	h	0	check_sum
+
+enumerations
+
+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 408 983 984