usb: gadget: pxa27x_udc: clean up comment

Spelling replacement
endpoitn to endpoint

Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20220418134838.1236023-1-trix@redhat.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>