flashrom.c: Resync misc change with upstream

BUG=b:139101642,b:162158026
BRANCH=none
TEST=builds

Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Change-Id: I522c91b54da4391567ecd6265c187288a2eba7c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/flashrom/+/2346126
Tested-by: Edward O'Callaghan <quasisec@chromium.org>
Auto-Submit: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Sam McNally <sammc@chromium.org>
Commit-Queue: Sam McNally <sammc@chromium.org>
diff --git a/programmer.h b/programmer.h
index 62697da..1b65ff6 100644
--- a/programmer.h
+++ b/programmer.h
@@ -158,7 +158,7 @@
 
 extern const struct programmer_entry programmer_table[];
 
-int programmer_init(enum programmer prog, char *param);
+int programmer_init(enum programmer prog, const char *param);
 int programmer_shutdown(void);
 
 struct bitbang_spi_master {