usb: gadget: ast2600: Fix a couple of spelling mistakes

There are a couple of spelling mistakes, one in a dev_warn message
and another in a SETUP_DBG message. Fix these and remove an extraneous
white space too.

Acked-by: Neal Liu <neal_liu@aspeedtech.com>
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220615073518.192827-1-colin.i.king@gmail.com


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