kernel: ACPI: processor: Check for null return of devm_kzalloc() in fch_misc_setup()

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Check for null return of devmkzalloc in fchmiscsetup devmkzalloc may fail, clkdata-name might be NULL and will cause a NULL pointer dereference later. rjw: Subject and changelog edits...