omapconf: get rid of macro based version information

Macro based revision information does not add value with ability to
pick up latest tag based information from git.

For platforms which copy files, we just use plain old Makefile based
version.

Signed-off-by: Nishanth Menon <nm@ti.com>
omapconf v1.69

Signed-off-by: Nishanth Menon <nm@ti.com>