ichspi: Add Intel Panther Lake support

PTL looks much like Lunar Lake. The only noticed differences so far are
a reserved frequency value that means 80MHz now, and that only 1.8V are
supported.

Tested `ich_descriptors_tool' output for the BIOS of an MSI Prestige 14
Flip AI+ (D3MTG).

Documents used:
  * Intel® Core™ Ultra Processors (Series 3) Datasheet, Volume 1 of 2
  * Panther Lake H External Design Specification (EDS) Volume 2 of 2
  * Panther Lake-H Client Platform
    SPI Programming Guide

Change-Id: Ifec90975cefc26bb7109d69fcdabcfe480516732
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/397
diff --git a/include/programmer.h b/include/programmer.h
index 43f7023..b19049e 100644
--- a/include/programmer.h
+++ b/include/programmer.h
@@ -371,6 +371,7 @@
 	CHIPSET_METEOR_LAKE,
 	CHIPSET_LUNAR_LAKE,
 	CHIPSET_ARROW_LAKE,
+	CHIPSET_PANTHER_LAKE,
 };
 
 /* ichspi.c */