google/reks: add new board as variant of cyan baseboard

Add support for google/reks (Lenovo Chromebook N22/N42) as
a variant of the cyan Braswell basebaseboard.

- Add board-specific code as the new reks variant
- Add new I2C touchscreen device and SPD files to the baseboard
for potential reuse by other variants

Sourced from Chromium branch firmware-reks-7287.133.B,
commit 7d812d4: Revert "Revert "soc/intel/braswell: Populate NVS SCC BAR1""

Change-Id: Iac9e2b5661aa33e12927f4cb84ebaee36522a385
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/21128
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/google/cyan/Kconfig b/src/mainboard/google/cyan/Kconfig
index b375729..9e5bc8a 100644
--- a/src/mainboard/google/cyan/Kconfig
+++ b/src/mainboard/google/cyan/Kconfig
@@ -43,11 +43,13 @@
 	string
 	default "cyan" if BOARD_GOOGLE_CYAN
 	default "edgar" if BOARD_GOOGLE_EDGAR
+	default "reks" if BOARD_GOOGLE_REKS
 
 config MAINBOARD_PART_NUMBER
 	string
 	default "Cyan" if BOARD_GOOGLE_CYAN
 	default "Edgar" if BOARD_GOOGLE_EDGAR
+	default "Reks" if BOARD_GOOGLE_REKS
 
 config MAINBOARD_VENDOR
 	string
@@ -57,6 +59,7 @@
 	string
 	default "variants/cyan/devicetree.cb" if BOARD_GOOGLE_CYAN
 	default "variants/edgar/devicetree.cb" if BOARD_GOOGLE_EDGAR
+	default "variants/reks/devicetree.cb" if BOARD_GOOGLE_REKS
 
 config VGA_BIOS_FILE
 	string
@@ -80,5 +83,6 @@
 	depends on CHROMEOS
 	default "CYAN TEST A-A 1829" if BOARD_GOOGLE_CYAN
 	default "EDGAR TEST A-A 2507" if BOARD_GOOGLE_EDGAR
+	default "REKS TEST A-A 3004" if BOARD_GOOGLE_REKS
 
 endif # BOARD_GOOGLE_BASEBOARD_CYAN