data-kernel: EMAC: Update code for EMAC Core version 4.0

1. PTP clock name is same for both v1 and v2
2. Update IO Macro settings for EMAC core version 4
3. Add Micrel phy registers in phy_reg dump in debug fs node
4. Remove the PHY interrupt register write and use generic
phy api instead to enable PHY link up/down interrupt

Change-Id: Iaab6194286cc9774342ff7396d03d6a2ed64ce2f
CRs-Fixed: 2348684
Acked-by: Nisha Menon <nmenon@qti.qualcomm.com>
Signed-off-by: Sunil Paidimarri <hisunil@codeaurora.org>