libnvme: add mi-mctp support for usb ports

Tested: changed the mi-mctp.c file and scp the mi-mctp executable to a
bmc on oecee11-nfd01 https://paste.googleplex.com/6204233714106368

Google-Bug-Id: 462810482
Change-Id: I9b21904fb14937fb1969316ad58f6972aefbac16
Signed-off-by: Yichao Wang <wangyic@google.com>
diff --git a/meta-gbmc-staging b/meta-gbmc-staging
index 08ecc59..d247f2c 160000
--- a/meta-gbmc-staging
+++ b/meta-gbmc-staging
@@ -1 +1 @@
-Subproject commit 08ecc59e11a040543d9271f90667ab7b0564dc4b
+Subproject commit d247f2cbe7f27275332256139e8b13d4a7083992