interconnect: qcom: sc7280: Add missing num_links to xm_pcie3_1 node

This allows adding interconnect paths for PCIe 1 in device tree later.

Fixes: 46bdcac5 ("interconnect: qcom: Add SC7280 interconnect provider driver")
Signed-off-by: Xilin Wu <sophon@radxa.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250613-sc7280-icc-pcie1-fix-v1-1-0b09813e3b09@radxa.com


Signed-off-by: Georgi Djakov <djakov@kernel.org>