CVE-2026-63907: uio: uio_pci_generic_sva: fix double free of devm_kzalloc() memory

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

uio: uiopcigenericsva: fix double free of devmkzalloc() memory

uiopcisva allocates struct uiopcisvadev with devmkzalloc() in probe(), but then calls kfree(udev) both on the probe() error path (label outfree) and again in remove().

Because devmkzalloc() allocations are devres-managed and are freed automatically when the device is detached (including after a failing probe() and during driver unbind), the explicit kfree() can lead to a double free.

If probe() fails after devmkzalloc(), the error path frees udev and devres cleanup will free it again when the core unwinds the partially bound device. On normal driver removal, remove() frees udev and devres will free it again when the device is detached.

This issue was identified by a static analysis tool I developed and confirmed by manual review. Fix by removing the manual kfree() calls and dropping the now-unused label.