sb/intel/ibexpeak: Drop invalid ME finalisation function

Was copied from bd82x6x and none of the PCI IDs matches that of Ibex
Peak (PCI_DID_INTEL_IBEXPEAK_HECI1 = 0x3b64). Remove the code. This
allows dropping the me_8.x.c dependency, which never made sense.

Change-Id: I54df1e080048c0599dbee687ec617fb724cb6634
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49989
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/southbridge/intel/ibexpeak/smihandler.c

@@ -148,7 +148,7 @@ void southbridge_smi_monitor(void)
 
 void southbridge_finalize_all(void)
 {
-	intel_me_finalize_smm();
+	/* TODO: Finalize ME */
 	intel_pch_finalize_smm();
 	intel_ironlake_finalize_smm();
 	intel_model_2065x_finalize_smm();