gpiolib: fix gpiochip_machine_hog()

There is a shifter vs vanilla mask bug here. We want to test if 1 << 11
is set but we're testing if 0xb is set.

Fixes: 9a6c505f7df1 ("gpiolib: add hogs support for machine code")
Signed-off-by: Dan Carpenter <[e-mail]>
Reviewed-by: Bartosz Golaszewski <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpiolib.c

···
 		return;
 	}
 
-	if (desc->flags & FLAG_IS_HOGGED)
+	if (test_bit(FLAG_IS_HOGGED, &desc->flags))
 		return;
 
 	rv = gpiod_hog(desc, hog->line_name, hog->lflags, hog->dflags);