google: Disable TPMv2 on most Chromebooks

This feature is not present on older Chromebooks, so disable the
setting.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/configs/chromebook_link64_defconfig b/configs/chromebook_link64_defconfig
index 7cf23b2..9583f87 100644
--- a/configs/chromebook_link64_defconfig
+++ b/configs/chromebook_link64_defconfig
@@ -80,6 +80,7 @@
 CONFIG_SYS_NS16550_PORT_MAPPED=y
 CONFIG_SPI=y
 CONFIG_TPM_TIS_LPC=y
+# CONFIG_TPM_V2 is not set
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
 CONFIG_FRAMEBUFFER_SET_VESA_MODE=y