msm: emac: ACPI support for EMAC driver

This patch enables ACPI support for the EMAC driver in addition to device
tree support. Added DSM method in ASL code to handle clock initialization.
The device specific parameters such as mac-address, phy_mode and
phy_channel are retrieved from EMAC _DSD table.

Change-Id: I643ffad0025d7977ede817178e1dd31deeba203e
Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Gilad Avidov <gavidov@codeaurora.org>
Signed-off-by: Alok Chauhan <alokc@codeaurora.org>