sb/intel/lynxpoint: Add native thermal init

Implement native thermal initialisation for Lynx Point. This is only
needed when MRC.bin is not used.

Change-Id: I4a67a3092d0c2e56bfdacb513a899ef838193cbd
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64180
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/lynxpoint/pch.h b/src/southbridge/intel/lynxpoint/pch.h
index d8fcf52..5fa9edb 100644
--- a/src/southbridge/intel/lynxpoint/pch.h
+++ b/src/southbridge/intel/lynxpoint/pch.h
@@ -115,6 +115,7 @@
 void pch_dmi_setup_physical_layer(void);
 void pch_dmi_tc_vc_mapping(u32 vc0, u32 vc1, u32 vcp, u32 vcm);
 void early_usb_init(void);
+void early_thermal_init(void);
 
 void usb_ehci_sleep_prepare(pci_devfn_t dev, u8 slp_typ);
 void usb_ehci_disable(pci_devfn_t dev);