petalinux: Fix phy addr initialization

This should be the part of patch:
"net: gem: Pass phy address to init"
(sha1: 6113546bff0eecbe85699bcafcb2e7030a1ae9ca)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
petalinux: Fix gem initialization

This patch should be the part of this patch:
"zynq: Move macros to hardware.h"
(sha1: 5218ca14d5580e9241305e4abe67f961dca8c00a)

which fix enabling gem driver when baseaddr is specified.
Address of the first gem must be hardcoded because
include hardware.h is not possible because contains
C code.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>