usb: dwc2: gadget: Reject LPM token during Control transfers

Avoiding switch to L1 state in any stage of control transfers.
Send NYET handshake to LPM token.

Renamed GLPMCFG_LPM_ACCEPT_CTRL_ISOC to GLPMCFG_LPM_REJECT_CTRL_CONTROL
because by setting this bit core reject LPM token.

Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>