ichspi: Add Intel Snow Ridge SoC

Hardware looks the same as C740 series / Emmitsburg. The descriptor,
however, has very different frequency settings and different regions
and masters.

The output of `ich_descriptors_tool' tested with an image from Intel
looks reasonable.

Change-Id: I9f9dc4414af63cbe48d22ef2955df28e297d7e4c
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/188
diff --git a/include/programmer.h b/include/programmer.h
index f82f11f..4d54582 100644
--- a/include/programmer.h
+++ b/include/programmer.h
@@ -367,6 +367,7 @@
 	CHIPSET_HAS_NEW_ACCESS_PERM, /****** BM_RAP/WAP regs from here on *****/
 
 	CHIPSET_C740_SERIES_EMMITSBURG = CHIPSET_HAS_NEW_ACCESS_PERM,
+	CHIPSET_SNOW_RIDGE,
 };
 
 /* ichspi.c */