EX-4056 revert LU-12019 build: Recognize Debian Kernel and set KMP dir

EX-4056 revert LU-12019 build: Recognize Debian Kernel and set KMP dir

This reverts commit 230d4500d5a9dfada392199d77fc413382f24750.

This caused MOFED modules to use in-kernel modules, and causing
lustre fails to load.

Test-Parameters: trivial
Change-Id: I205368dccc5fd18ed0ee096c1d85e140c3de5d6d
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/45327
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>