ssa.c: Revert patches related to prdb_calc_in_progress and update pending (for SMDB) in access layer

These changes are not needed going forward.

Following 4 patches were reverted as part of this patch:

commit 3d8311f15fd8abda2ffa36f0eb660053ddc9af66
Author: Hal Rosenstock <hal@mellanox.com>
Date:   Fri Oct 17 14:56:36 2014 +0200

    ssa.c: Remove unneeded argument from ssa_access_smdb_update_ready internal A

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

commit 44f4f671adec659e5c381a8da055fd5a4f20f7a9
Author: Hal Rosenstock <hal@mellanox.com>
Date:   Fri Oct 17 14:46:30 2014 +0200

    ssa.c: Support prdb_calc_in_progress and update pending on SSA_CONN_DONE mes

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

commit e6ab752419b1050a99d16cd04ca50eebe5fdcce8
Author: Hal Rosenstock <hal@mellanox.com>
Date:   Fri Oct 17 14:14:12 2014 +0200

    ssa.c: Support update pending (for SMDB) in access layer

    Change ssa_downstream_smdb_update_ready to return 1 if PRDB calculation
    is in progress

    Access will send DB update ready message to extract/core threads
    when appropriate.

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

commit f25a1142ab591e963f98f8d4248783935f62502c
Author: Hal Rosenstock <hal@mellanox.com>
Date:   Thu Oct 16 19:14:04 2014 +0200

    ssa.c: Add prdb_calc_in_progress flag into ssa_access_handler

    when PRDBs are being recalculated due to SMDB update

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

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