Revert "Update all programmer init functions to register bus programmers into common list"

This reverts commit 63b92f99a9d43dd637bcce564cd372be3c81c5d8.

BUG=chromium:635405

Change-Id: I94ae18b547d2aedd74fc7103a38dcbfd2f57be66
Reviewed-on: https://chromium-review.googlesource.com/367504
Commit-Ready: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
diff --git a/serprog.c b/serprog.c
index 3d85529..7aeaf58 100644
--- a/serprog.c
+++ b/serprog.c
@@ -334,7 +334,7 @@
 
 static enum chipbustype serprog_buses_supported = BUS_NONE;
 
-int serprog_init(struct flashctx *flash)
+int serprog_init(void)
 {
 	uint16_t iface;
 	unsigned char pgmname[17];