Revert "NFC: fix attrs checks in netlink interface"
This reverts commit 18917d51.

Our checks found weird attrs present check in function
nfc_genl_dep_link_down() and nfc_genl_llc_get_params(), which are
introduced by commit 18917d51 ("NFC: fix attrs checks in netlink
interface").

According to its message, it should add checks for functions
nfc_genl_deactivate_target() and nfc_genl_fw_download(). However, it
didn't do that. In fact, the expected checks are added by
(1) commit 385097a3 ("nfc: Ensure presence of required attributes in
the deactivate_target handler") and
(2) commit 280e3ebd ("nfc: Ensure presence of NFC_ATTR_FIRMWARE_NAME
attribute in nfc_genl_fw_download()"). Perhaps something went wrong.

Anyway, the attr NFC_ATTR_TARGET_INDEX is never accessed in callback
nfc_genl_dep_link_down() and same for NFC_ATTR_FIRMWARE_NAME and
nfc_genl_llc_get_params(). Thus, remove those checks.
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Link: https://lore.kernel.org/r/20240410034846.167421-1-linma@zju.edu.cnSigned-off-by: Jakub Kicinski <kuba@kernel.org>