USB: typec: tcpci: Make tcpci_pm_ops variable static

USB: typec: tcpci: Make tcpci_pm_ops variable static

File-scope 'tcpci_pm_ops' is not used outside of this unit, so make it
static to silence sparse warning:

  tcpm/tcpci.c:1002:1: warning: symbol 'tcpci_pm_ops' was not declared. Should it be static?

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://patch.msgid.link/20260216110403.159945-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>