Replaced st,st21nfca-i2c by st,st21nfca_i2c to be concistent
with below configuration and driver in drivers/nfc/st21nfca/
Signed-off-by: NChristophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>