net: macb: Add phy address to read it from device tree

net: macb: Add phy address to read it from device tree

Read phy address from device tree and use it to find the phy device
if not found then search in the range of 0 to 31.

Signed-off-by: Padmarao Begari <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Tested-by: Bin Meng <[email protected]>