drivers: serial: kgdboc: Drop checks for CON_ENABLED and CON_BOOT

The original code tried to find a console that has CON_BOOT _or_
CON_ENABLED flag set. The flag CON_ENABLED is set to all registered
consoles, so in this case this check is always true, even for the
CON_BOOT consoles.

The initial intent of the kgdboc_earlycon_init was to get a console
early (CON_BOOT) or later on in the process (CON_ENABLED). The
code was using for_each_console macro, meaning that all console structs
were previously registered on the printk() machinery. At this point,
any console found on for_each_console is safe for kgdboc_earlycon_init
to use.

Dropping the check makes the code cleaner, and avoids further confusion
by future readers of the code.

Signed-off-by: Marcos Paulo de Souza <[e-mail]>
Reviewed-by: Petr Mladek <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Petr Mladek <[e-mail]>

drivers/tty/serial/kgdboc.c

···
 	console_list_lock();
 	for_each_console(con) {
 		if (con->write && con->read &&
-		    (con->flags & (CON_BOOT | CON_ENABLED)) &&
 		    (!opt || !opt[0] || strcmp(con->name, opt) == 0))
 			break;
 	}