Drop redundant enum msglevel

Use `enum flashrom_log_level` instead to avoid further confusion.

Change-Id: I1895cb8f60da3abf70c9c2953f52414cd2cc10a9
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/20268
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

libflashrom.h

@@ -27,7 +27,7 @@
 int flashrom_init(int perform_selfcheck);
 int flashrom_shutdown(void);
 /** @ingroup flashrom-general */
-enum flashrom_log_level { /* This has to match enum msglevel. */
+enum flashrom_log_level {
 	FLASHROM_MSG_ERROR	= 0,
 	FLASHROM_MSG_WARN	= 1,
 	FLASHROM_MSG_INFO	= 2,