[SCSI] hpsa: Change memset using sizeof(ptr) to sizeof(*ptr)

Not at all sure this is correct or appropriate to change,
but this seems odd.

Found via coccinelle script

@@
type T;
T* ptr;
expression E1;
@@

* memset(E1, 0, sizeof(ptr));
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

drivers/scsi/hpsa.c

@@ -1329,7 +1329,7 @@ static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
 	int retry_count = 0;
 
 	do {
-		memset(c->err_info, 0, sizeof(c->err_info));
+		memset(c->err_info, 0, sizeof(*c->err_info));
 		hpsa_scsi_do_simple_cmd_core(h, c);
 		retry_count++;
 	} while (check_for_unit_attention(h, c) && retry_count <= 3);