scsi: Remove unnecessary casts of void ptr returning alloc function return values

The [vk][cmz]alloc(_node) family of functions return void pointers which
it's completely unnecessary/pointless to cast to other pointer types since
that happens implicitly.

This patch removes such casts from drivers/scsi/

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/scsi/aic7xxx/aic7xxx_core.c

@@ -4780,7 +4780,7 @@ ahc_init_scbdata(struct ahc_softc *ahc)
 	SLIST_INIT(&scb_data->sg_maps);
 
 	/* Allocate SCB resources */
-	scb_data->scbarray = (struct scb *)kmalloc(sizeof(struct scb) * AHC_SCB_MAX_ALLOC, GFP_ATOMIC);
+	scb_data->scbarray = kmalloc(sizeof(struct scb) * AHC_SCB_MAX_ALLOC, GFP_ATOMIC);
 	if (scb_data->scbarray == NULL)
 		return (ENOMEM);
 	memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX_ALLOC);