Revert "dpdk: drop dpdk submodule"

This reverts commit cb8087dfac31b8490fefdfca28d389b7b9901ef8.

The seastar submodule's .gitmodules links to `../dpdk` which is no longer present after removing dpdk from ceph.git's .gitmodules.

```
<dwfreed> the ceph/seastar repo uses awful URLs for the submodules
<dwfreed> and those awful URLs are the real reason it's failing
<dwfreed> dgalloway: ^^^
<dwfreed> seastar's .gitmodules references repos in the parent directory, so that when it's checked out as a submodule of ceph, you don't download the repos twice (and git will probably also use references instead of duplicating the local .git); however, ceph doesn't have a submodule for dpdk anymore
<dwfreed> so seastar's referencing a dpdk repo that doesn't exist
<dgalloway> i think i follow.  so you're suggesting revert https://github.com/ceph/ceph/commit/cb8087dfac31b8490fefdfca28d389b7b9901ef8 ?
<dwfreed> yep
<dwfreed> that'd be one way to fix it
...
<joshd> dgalloway: I'd suggest revert for now, and let the crimson folks figure out the longer term fix when they're back
```

Signed-off-by: David Galloway <dgallowa@redhat.com>

diff --git a/.gitmodules b/.gitmodules
index bd07553dc9c0cf16a90adbc8fc54dfc9fd8c4c54..5a1c131ecfc13bb1541e0b8b47ed143c5e2f29be 100644 (file)
--- a/.gitmodules
+++ b/.gitmodules
@@ -40,6 +40,9 @@
        url = https://github.com/ceph/lua.git
        branch = lua-5.3-ceph
        ignore = dirty
+[submodule "src/dpdk"]
+       path = src/dpdk
+       url = https://github.com/ceph/dpdk
 [submodule "src/zstd"]
        path = src/zstd
        url = https://github.com/facebook/zstd