scsi: aic7xxx: Use kzalloc() instead of kmalloc()+memset()

There are a couple of places where kzalloc() could be used directly instead
of calling kmalloc() then memset(). Replace them.

Link: https://lore.kernel.org/r/20200403163611.46756-1-alex.dewar@gmx.co.ukSigned-off-by: Alex Dewar <alex.dewar@gmx.co.uk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aic7xxx/aic79xx_core.c

@@ -6054,14 +6054,13 @@ ahd_alloc(void *platform_arg, char *name)
 {
 	struct  ahd_softc *ahd;
 
-	ahd = kmalloc(sizeof(*ahd), GFP_ATOMIC);
+	ahd = kzalloc(sizeof(*ahd), GFP_ATOMIC);
 	if (!ahd) {
 		printk("aic7xxx: cannot malloc softc!\n");
 		kfree(name);
 		return NULL;
 	}
 
-	memset(ahd, 0, sizeof(*ahd));
 	ahd->seep_config = kmalloc(sizeof(*ahd->seep_config), GFP_ATOMIC);
 	if (ahd->seep_config == NULL) {
 		kfree(ahd);

drivers/scsi/aic7xxx/aic7xxx_core.c

@@ -4384,13 +4384,13 @@ ahc_alloc(void *platform_arg, char *name)
 	struct  ahc_softc *ahc;
 	int	i;
 
-	ahc = kmalloc(sizeof(*ahc), GFP_ATOMIC);
+	ahc = kzalloc(sizeof(*ahc), GFP_ATOMIC);
 	if (!ahc) {
 		printk("aic7xxx: cannot malloc softc!\n");
 		kfree(name);
 		return NULL;
 	}
-	memset(ahc, 0, sizeof(*ahc));
+
 	ahc->seep_config = kmalloc(sizeof(*ahc->seep_config), GFP_ATOMIC);
 	if (ahc->seep_config == NULL) {
 		kfree(ahc);