NFC: Use NFC_MAX_GT_LEN to check len in nci_set_local_general_bytes

local_gb is of size NFC_MAX_GT_LEN and len is used as index for it.
Check len against this instead of NCI_MAX_PARAM_LEN before accessing
local_gb.

Signed-off-by: Szymon Janc <szymon.janc@tieto.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>