usb: dwc2: Rename CONFIG_DWC2 namespace to DWC2

There are a number of DWC2 configuration options that are set in dwc2.h
and referenced in dwc2.c only.  Move these out of the CONFIG_DWC2
namespace and in to the DWC2 namespace.  Note that hikey was defining an
option that was already always enabled, so we can remove that hunk.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
4 files changed