Remove access layer dependency on ACM and plugin

that was recently introduced with initial integration of access layer.

This was accomplished by adding additional ACCESS define to ssa.c
to conditionalize the call that cause the access layer to be
pulled in even when not required (in plugin/core and ACM).

Also, reverted Makefile.ams appropriately.

Signed-off-by: Hal Rosenstock <hal@mellanox.com>