[vmbase] Move SwiotlbInfo from pvmfw to vmbase

for reuse in both pvmfw and rialto to init shared memory.

Bug: 284462758
Test: m pvmfw_img
Change-Id: Ibe7b8b1bb8d10fbbdc4ec3348e801084c9a93bfd
diff --git a/vmbase/src/lib.rs b/vmbase/src/lib.rs
index ebb3707..54f3384 100644
--- a/vmbase/src/lib.rs
+++ b/vmbase/src/lib.rs
@@ -22,6 +22,7 @@
 mod bionic;
 pub mod console;
 mod entry;
+pub mod fdt;
 pub mod layout;
 mod linker;
 pub mod logger;