Revert "ALSA: usb-audio: Fix wrong kfree issue in snd_usb_endpoint_free_all"

This reverts commit a6f53df5 which is
commit 03a8b0df upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I7ca9e21f3364783bb57fb574f67facb8d0984ec2
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>