usb: ehci: exynos: set/reset hsic phys

The controller has 3 ports. The port0 is for USB 2.0 Phy, port1 and port2
are for HSIC phys. The usb 2.0 phy is already being setup. This patch
sets up the hsic phys.

Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>