msm: phy: Add WOL functions in micrel driver

Enable WOL functionality for magic pkt, cable plug in and out
on Micrel PHY.
Enable PME_N2 and INT_N output on the same interrupt line.

Change-Id: I6c20a8ec85a3dd8e7ec152305ffb3849cb2eab84
Acked-by: Nisha Menon <nmenon@qti.qualcomm.com>
Signed-off-by: Sunil Paidimarri <hisunil@codeaurora.org>