cli_classic: Replace programmer_shutdown() with libflashrom call

flashrom_programmer_shutdown(NULL) is an equiv call
to programmer_shutdown() however this further decouples
cli from flashrom core logic at link-time, prefering to
instead enter via libflashrom instead.

Tested: `make`.

Change-Id: Ie194fa2e891797a29d05d7e9d0c7226fd62c0679
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/61584
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72297
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/cli_classic.c b/cli_classic.c
index e26c343..587ecef 100644
--- a/cli_classic.c
+++ b/cli_classic.c
@@ -760,7 +760,7 @@
 	flashrom_layout_release(layout);
 
 out_shutdown:
-	programmer_shutdown();
+	flashrom_programmer_shutdown(NULL);
 out:
 	for (i = 0; i < chipcount; i++) {
 		flashrom_layout_release(flashes[i].default_layout);