net: stmmac: Fix gpio reset & other issue

Add support for proper GPIO reset & qcom
specific changes.

Change-Id: Iad7a40d896c6847e06f775449f5c54dd828815b8
Acked-by: Nagarjuna Chaganti <nchagant@qti.qualcomm.com>
Signed-off-by: Suraj Jaiswal <jsuraj@codeaurora.org>