[media] drivers: media: i2c: adv7343_regs.h: Fix typo in #ifndef

Test for definedness of the macro which is actually defined, and which
matches the name of the file.

Signed-off-by: Rasmus Villemoes <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/i2c/adv7343_regs.h

···
  * GNU General Public License for more details.
  */
 
-#ifndef ADV7343_REG_H
+#ifndef ADV7343_REGS_H
 #define ADV7343_REGS_H
 
 struct adv7343_std_info {