spdk: advance to upstream dc82989dd2747db0384cafb3b310f2e8792d5c24

This fixes a py2/3-related build issue in SPDK.

Signed-off-by: Nathan Cutler <ncutler@suse.com>

diff --git a/src/spdk b/src/spdk
index 601bcbcf666516cd6a3e3a0b515d4ea477485187..dc82989dd2747db0384cafb3b310f2e8792d5c24 160000 (submodule)
--- a/src/spdk
+++ b/src/spdk
@@ -1 +1 @@
-Subproject commit 601bcbcf666516cd6a3e3a0b515d4ea477485187
+Subproject commit dc82989dd2747db0384cafb3b310f2e8792d5c24