AtomFpgaCore: three small changes, see full lof for details
AtomFpgaCore: three small changes, see full lof for details

1. Expose cpu_addr (to support overlaying test ROM images)
2. Continue to generate phi2 during reset
3. Fix issue when CImplSDDOS and CImplAtoMMC2 are both false

Change-Id: Ie76e1650cc6d641a3f1c4745d9e42370f2c2286e

hoglet67/AtomFpga,hoglet67/AtomFpga,hoglet67/AtomFpga