ALSA: sc6000: Fix incorrect sizeof operator

Static analysis is warning that the sizeof being used is should be
of *vport and not vport. Although these are the same size it is not
a portable assumption to assume this is true for all cases.  Fix this
by using sizeof(*vport).

Addresses-Coverity: ("Sizeof not portable")
Fixes: 111601ff ("ALSA: sc6000: Allocate resources with device-managed APIs")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210720161707.74197-1-colin.king@canonical.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/sc6000.c

@@ -552,7 +552,7 @@ static int snd_sc6000_probe(struct device *devptr, unsigned int dev)
 
 
 	err = snd_devm_card_new(devptr, index[dev], id[dev], THIS_MODULE,
-				sizeof(vport), &card);
+				sizeof(*vport), &card);
 	if (err < 0)
 		return err;