printk: reduce setup_text_buf size to LOG_LINE_MAX

@setup_text_buf only copies the original text messages (without any
prefix or extended text). It only needs to be LOG_LINE_MAX in size.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200930090134.8723-3-john.ogness@linutronix.de

kernel/printk/printk.c

@@ -1095,7 +1095,7 @@ static unsigned int __init add_to_rb(struct printk_ringbuffer *rb,
 	return prb_record_text_space(&e);
 }
 
-static char setup_text_buf[CONSOLE_EXT_LOG_MAX] __initdata;
+static char setup_text_buf[LOG_LINE_MAX] __initdata;
 
 void __init setup_log_buf(int early)
 {