HID: pidff: Make sure to fetch pool before checking SIMULTANEOUS_MAX

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Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-097)

The version of kernel installed on the remote host is prior to 5.10.238-234.956. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2025-097 advisory. In the Linux kernel, the following vulnerability has been resolved: mm/khugepaged: fix -anonvma race...