mb/lenovo/x230: List Lenovo X230t convertible/tablet as variant

Lenovo ThinkPad X230t Convertible Laptop works well with X230 default
image (see CB:34361).

Change-Id: Ib0a73fd551f0d26c789d3fd13541b2d1571742cb
Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38482
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/lenovo/x230/Kconfig b/src/mainboard/lenovo/x230/Kconfig
index bf70950..73dfdf6 100644
--- a/src/mainboard/lenovo/x230/Kconfig
+++ b/src/mainboard/lenovo/x230/Kconfig
@@ -1,4 +1,4 @@
-if BOARD_LENOVO_X230
+if BOARD_LENOVO_X230 || BOARD_LENOVO_X230T
 
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
@@ -52,7 +52,8 @@
 
 config MAINBOARD_PART_NUMBER
 	string
-	default "ThinkPad X230"
+	default "ThinkPad X230" if BOARD_LENOVO_X230
+	default "ThinkPad X230t" if BOARD_LENOVO_X230T
 
 config MAX_CPUS
 	int
@@ -74,4 +75,4 @@
 	string
 	default "8086,0166"
 
-endif # BOARD_LENOVO_X230
+endif # BOARD_LENOVO_X230 || BOARD_LENOVO_X230T
diff --git a/src/mainboard/lenovo/x230/Kconfig.name b/src/mainboard/lenovo/x230/Kconfig.name
index d207653..10fdc2e 100644
--- a/src/mainboard/lenovo/x230/Kconfig.name
+++ b/src/mainboard/lenovo/x230/Kconfig.name
@@ -1,2 +1,5 @@
 config BOARD_LENOVO_X230
 	bool "ThinkPad X230"
+
+config BOARD_LENOVO_X230T
+	bool "ThinkPad X230t"