vc: switch state to bool

The code currently uses bitfields to store true-false values. Switch all
of that to bools. Apart from the cleanup, it saves 20B of code as many
shifts, ANDs, and ORs became simple movzb's.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200615074910.19267-3-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/console_struct.h

@@ -54,10 +54,10 @@ struct vc_state {
 
 	/* attribute flags */
 	enum vc_intensity intensity;
-	unsigned int	italic		: 1;
-	unsigned int	underline	: 1;
-	unsigned int	blink		: 1;
-	unsigned int	reverse		: 1;
+	bool		italic;
+	bool		underline;
+	bool		blink;
+	bool		reverse;
 };
 
 /*