[PATCH] drivers/perf: Add NULL check in tx2_uncore_pmu_register

[Markus Elfring]

> When devm_kasprintf() fails, it returns a NULL pointer. However, this return value is not properly checked in the function tx2_uncore_pmu_register.
>
> A NULL check should be added after the devm_kasprintf() to prevent potential NULL pointer dereference error.

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  https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.14#n94

Regards,
Markus