usb: dwc2: host: Correct snpsid checking for GDFIFOCFG

GDFIFOCFG is available from IP version 2.91a. Fix the code to reflect
this.

Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>