mainboard/lenovo/{t430s,t420s,t520,t530,x220}: Add TPM 1.2 mainboard support

Every Lenovo Thinkpad includes a Trusted Platform Module, so we can enable
it for the sandy-/ivybridge platforms.

Change-Id: Icda443ba88c2a49a0033014ce7710dd607fa15dc
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: http://review.coreboot.org/10411
Tested-by: build bot (Jenkins)
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/mainboard/lenovo/t420s/Kconfig b/src/mainboard/lenovo/t420s/Kconfig
index be18eb0a..47e70d6 100644
--- a/src/mainboard/lenovo/t420s/Kconfig
+++ b/src/mainboard/lenovo/t420s/Kconfig
@@ -20,6 +20,7 @@
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_HAS_NATIVE_VGA_INIT_TEXTMODECFG
 	select SANDYBRIDGE_LVDS
+	select MAINBOARD_HAS_LPC_TPM
 
 	# Workaround for EC/KBC IRQ1.
 	select SERIRQ_CONTINUOUS_MODE