kernel: powercap: intel_rapl: Fix a NULL pointer dereference

In the Linux kernel, the following vulnerability has been resolved: powercap: intelrapl: Fix a NULL pointer dereference The Linux kernel CVE team has assigned CVE-2024-26975 to this issue. Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024050133-CVE-2024-26975-d184@gregkh/T...