kgdb: fix gcc-11 warnings harder

40cc3a80bb42 ("kgdb: fix gcc-11 warning on indentation") tried to fix up
the gcc-11 complaints in this file by just reformatting the #defines.
That worked for gcc 11.1.0, but in gcc 11.1.1 as shipped by Fedora 34,
the warning came back for one of the #defines.

Fix this up again by putting { } around the if statement, now it is
quiet again.

Fixes: 40cc3a80bb42 ("kgdb: fix gcc-11 warning on indentation")
Cc: Arnd Bergmann <[e-mail]>
Cc: Daniel Thompson <[e-mail]>
Cc: Jason Wessel <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/kgdbts.c

···
 		printk(KERN_INFO a);	\
 } while (0)
 #define v2printk(a...) do {		\
-	if (verbose > 1)		\
+	if (verbose > 1) {		\
 		printk(KERN_INFO a);	\
+	}				\
 	touch_nmi_watchdog();		\
 } while (0)
 #define eprintk(a...) do {		\