disk_bfq: Set ioprio directly without regard to the contract

diff --git a/src/frsh_forb b/src/frsh_forb
index 3c2e744f5bf18c67d96f5c2f48aad64983dbdea1..804eb2e2cfe0694efcdc0695e686ddfec21b531c 160000 (submodule)
--- a/src/frsh_forb
+++ b/src/frsh_forb
@@ -1 +1 @@
-Subproject commit 3c2e744f5bf18c67d96f5c2f48aad64983dbdea1
+Subproject commit 804eb2e2cfe0694efcdc0695e686ddfec21b531c