mb/google/rex: Create rex4es variant

This patch creates a new variant rex4es. The new variant will support ESx samples. The existing rex variant will support the QS samples.

BUG=b:290732344
TEST=Able to build google/rex4es board and boot on target hardware.

Change-Id: I25dd1f42ee812f47289da0c2ef7aa79d6f340d48
Signed-off-by: Dinesh Gehlot <digehlot@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76605
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index 9c75508..bbd20e3 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -107,14 +107,14 @@
 	default "Google_Ovis" if BOARD_GOOGLE_BASEBOARD_OVIS
 
 config MAINBOARD_PART_NUMBER
-	default "Rex" if BOARD_GOOGLE_REX0 || BOARD_GOOGLE_REX_EC_ISH
+	default "Rex" if BOARD_GOOGLE_REX0 || BOARD_GOOGLE_REX_EC_ISH || BOARD_GOOGLE_REX4ES
 	default "Screebo" if BOARD_GOOGLE_SCREEBO
 	default "Karis" if BOARD_GOOGLE_KARIS
 	default "Ovis" if BOARD_GOOGLE_OVIS
 
 config VARIANT_DIR
 	string
-	default "rex0" if BOARD_GOOGLE_REX0 || BOARD_GOOGLE_REX_EC_ISH
+	default "rex0" if BOARD_GOOGLE_REX0 || BOARD_GOOGLE_REX_EC_ISH || BOARD_GOOGLE_REX4ES
 	default "screebo" if BOARD_GOOGLE_SCREEBO
 	default "karis" if BOARD_GOOGLE_KARIS
 	default "ovis" if BOARD_GOOGLE_OVIS
@@ -139,7 +139,7 @@
 
 config DRIVER_TPM_I2C_BUS
 	hex
-	default 0x4 if BOARD_GOOGLE_REX0 || BOARD_GOOGLE_SCREEBO || BOARD_GOOGLE_REX_EC_ISH || BOARD_GOOGLE_OVIS
+	default 0x4 if BOARD_GOOGLE_REX0 || BOARD_GOOGLE_SCREEBO || BOARD_GOOGLE_REX_EC_ISH || BOARD_GOOGLE_OVIS || BOARD_GOOGLE_REX4ES
 
 config DRIVER_TPM_I2C_ADDR
 	hex
diff --git a/src/mainboard/google/rex/Kconfig.name b/src/mainboard/google/rex/Kconfig.name
index 94ae1a0..eea2a52 100644
--- a/src/mainboard/google/rex/Kconfig.name
+++ b/src/mainboard/google/rex/Kconfig.name
@@ -20,3 +20,7 @@
 config BOARD_GOOGLE_OVIS
 	bool "-> Ovis"
 	select BOARD_GOOGLE_BASEBOARD_OVIS
+
+config BOARD_GOOGLE_REX4ES
+	bool "-> Rex4ES"
+	select BOARD_GOOGLE_MODEL_REX