USB: EHCI: Add registers support for SMSC hsic hub

Add SMSC hub registers that can be changed over I2C bus
for changing the default configuration.

Change-Id: Ib1cd158fdd3c3f58d7211428984ca424563c4f14
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
2 files changed