nvme-fabrics: remove memset in nvmf_reg_write32()

Declare and initialize structure variable to the zero values so that we
can get rid of the zeroout memset call.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/fabrics.c

@@ -235,10 +235,9 @@ EXPORT_SYMBOL_GPL(nvmf_reg_read64);
  */
 int nvmf_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val)
 {
-	struct nvme_command cmd;
+	struct nvme_command cmd = { };
 	int ret;
 
-	memset(&cmd, 0, sizeof(cmd));
 	cmd.prop_set.opcode = nvme_fabrics_command;
 	cmd.prop_set.fctype = nvme_fabrics_type_property_set;
 	cmd.prop_set.attrib = 0;