programmer_table: convert entries to pointers

Allows us to move the individual entries into their respective
driver files.

Change-Id: Ifbb0ee4db5a85b1cd2afeafe4dca838579f79878
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.de>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/52945
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/programmer.h b/programmer.h
index ad48582..50ec930 100644
--- a/programmer.h
+++ b/programmer.h
@@ -160,7 +160,7 @@
 	void (*delay) (unsigned int usecs);
 };
 
-extern const struct programmer_entry programmer_table[];
+extern const struct programmer_entry *const programmer_table[];
 extern const size_t programmer_table_size;
 
 int programmer_init(enum programmer prog, const char *param);