rtc: pl031: fix rtc features null pointer dereference
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.16.19 by commit d274ce4a3dfd0b9a292667535578359b865765cb, it was introduced in version v5.12 by commit d9b0dd54a1943f47a381a474f8ea2c94466110c0. For more details please see the references link.