interconnect: qcom: sm8450: Fix NULL pointer dereference in icc_link_nodes()

In the Linux kernel, the following vulnerability has been resolved:

interconnect: qcom: sm8450: Fix NULL pointer dereference in icc_link_nodes()

The change to dynamic IDs for SM8450 platform interconnects left two links

unconverted, fix it to avoid the NULL pointer dereference in runtime,

when a pointer to a destination interconnect is not valid:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008

<...>

Call trace:

icc_link_nodes+0x3c/0x100 (P)

qcom_icc_rpmh_probe+0x1b4/0x528

platform_probe+0x64/0xc0

really_probe+0xc4/0x2a8

__driver_probe_device+0x80/0x140

driver_probe_device+0x48/0x170

__device_attach_driver+0xc0/0x148

bus_for_each_drv+0x88/0xf0

__device_attach+0xb0/0x1c0

device_initial_probe+0x58/0x68

bus_probe_device+0x40/0xb8

deferred_probe_work_func+0x90/0xd0

process_one_work+0x15c/0x3c0

worker_thread+0x2e8/0x400

kthread+0x150/0x208

ret_from_fork+0x10/0x20

Code: 900310f4 911d6294 91008280 94176078 (f94002a0)

---[ end trace 0000000000000000 ]---

Kernel panic - not syncing: Oops: Fatal exception