stand: Use c99 structure initialization for userboot's host_fsops

Sponsored by:		Netflix

stand/userboot/userboot/host.c

@@ -155,14 +155,14 @@ host_dev_strategy(void *devdata, int rw, daddr_t dblk, size_t size,
 }
 
 struct fs_ops host_fsops = {
-	"host",
-	host_open,
-	host_close,
-	host_read,
-	null_write,
-	host_seek,
-	host_stat,
-	host_readdir
+	.fs_name = "host",
+	.fo_open = host_open,
+	.fo_close = host_close,
+	.fo_read = host_read,
+	.fo_write = null_write,
+	.fo_seek = host_seek,
+	.fo_stat = host_stat,
+	.fo_readdir = host_readdir,
 };
 
 struct devsw host_dev = {