Revert "BLN: fix compilation warnings"

This reverts commit 3ef6205b4f886154139be1f90c66d5cf976be1f8.
Revert "fixed the BLN kernel config option"

This reverts commit 61c5d0d89a715e14766f18740423c7aada1e272b.
Revert "enable BLN support"

This reverts commit f39611fe1e6248f5a67bf9444e2d5a9948ea16a3.