ALSA: core: Drop superfluous no_free_ptr() for memdup_user() errors

We used to wrap with no_free_ptr() for the return value from
memdup_user() with errors where the auto cleanup is applied.  This was
a workaround because the initial implementation of kfree auto-cleanup
checked only NULL pointers.

Since recently, though, the kfree auto-cleanup checks with
IS_ERR_OR_NULL() (by the commit cd7eb8f83fcf ("mm/slab: make
__free(kfree) accept error pointers")), hence those workarounds became
superfluous.  Let's drop them now.

Link: https://patch.msgid.link/20240902075246.3743-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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