Automatically unmap physmap()s

Similarly to the previous PCI self-clean up patch this one allows to get rid
of a huge number of programmer shutdown functions and makes introducing
bugs harder. It adds a new function rphysmap() that takes care of unmapping
at shutdown. Callers are changed where it makes sense.

Corresponding to flashrom svn r1714.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/programmer.h b/programmer.h
index 4db8d58..f9f5241 100644
--- a/programmer.h
+++ b/programmer.h
@@ -276,6 +276,7 @@
 
 /* physmap.c */
 void *physmap(const char *descr, uintptr_t phys_addr, size_t len);
+void *rphysmap(const char *descr, uintptr_t phys_addr, size_t len);
 void *physmap_try_ro(const char *descr, uintptr_t phys_addr, size_t len);
 void physunmap(void *virt_addr, size_t len);
 #if CONFIG_INTERNAL == 1