sdwb: add reserved field to header to align to 0x20 bytes

Signed-off-by: Manohar Vanga <manohar.vanga@cern.ch>

simulation/fw/wb_cfggen.c

@@ -57,6 +57,8 @@ struct sdwb_head *sdwb_create_header(uint64_t wbid_addr, uint64_t wbd_addr)
 	if (!head)
 		return NULL;
 
+	memset(head, 0, sizeof(struct sdwb_head));
+
 	head->magic = SDWB_HEAD_MAGIC;
 	head->wbid_address = wbid_addr;
 	head->wbd_address = wbd_addr;

simulation/include/linux/sdwb.h

@@ -42,6 +42,7 @@ struct sdwb_head {
 	uint64_t magic;
 	uint64_t wbid_address;
 	uint64_t wbd_address;
+	uint64_t reserved;
 };
 
 /*