Fixes the following two Coccinelle/coccicheck warnings reported by
badzero.cocci:

	WARNING comparing pointer to 0
	WARNING comparing pointer to 0
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Reviewed-by: Andreas Larsson <andreas@gaisler.com>
Link: https://lore.kernel.org/r/20240404192932.13075-2-thorsten.blum@toblux.comSigned-off-by: Andreas Larsson <andreas@gaisler.com>