NFC: nci: Fix warning: cast to restricted __le16

Fixing: net/nfc/nci/ntf.c:106:31: warning: cast to restricted __le16
message when building with make C=1 CF=-D__CHECK_ENDIAN__

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>