Add Gemini Lake support

The SPI hardware is pretty much unchanged from Apollo Lake. However, the
IFD differs significantly enough to require special handling.

Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Change-Id: I8843ace1f024da04c80b419011841ccae4e48990

programmer.h

@@ -672,6 +672,7 @@ enum ich_chipset {
 	CHIPSET_300_SERIES_CANNON_POINT,
 	CHIPSET_APOLLO_LAKE,
 	CHIPSET_400_SERIES_COMET_POINT,
+	CHIPSET_GEMINI_LAKE,
 };
 
 /* ichspi.c */