usb: dwc3-am62: Fix up wake-up configuration and spurious wake up

Explicitly set and clear wakeup config so we don't leave anything
to chance.

Clear wakeup status on suspend so we know what caused wake up.

The LINESTATE wake up should not be enabled in device mode
if we are not connected to a USB host and in USB suspend (U2/L3)
else it will cause spurious wake up.

For now, don't enable LINESTATE. This means wake up from
USB resume will not work but at least we won't have any spurious
wake ups.

Signed-off-by: Roger Quadros <[email protected]>
Acked-by: Thinh Nguyen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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