usb: ucsi: huawei_gaokun: make gaokun_ucsi_ops static

usb: ucsi: huawei_gaokun: make gaokun_ucsi_ops static

The gaokun_ucsi_ops structure is only used within its translation unit
and is not referenced from any other file. Add the 'static' qualifier
to avoid unnecessary symbol export.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202603050203.KD4RWA00-lkp@intel.com
Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260305144054.27848-1-mitltlatltl@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>