ARM: S3C2416: Add USB Phy register definitions

Add register definitions required to configure the USB Phy. The definitions
for PHYCTRL, PHYPWR, URSTCON and UCLKCON registers and corresponding bit
field definitions are added.

Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>