usb: musb: fix spelling mistake: "periperal" -> "peripheral"

There is a spelling mistake in a dev_err error message. Fix it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200117093124.97965-1-colin.king@canonical.com


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