phy: ti: phy-j721e-wiz: Add SGMII support in wiz driver for J7200

commit dfdf4eca96a95a016768f15506a88d35be3625f6 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git

Select the same mac divider for SGMII too as the one being used for
QSGMII.

Enable full rate divider configuration support for J721E_WIZ_10G for
SGMII.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>