MAINTAINERS: nfc: Add missing platform_data files references

Add missing platform_data file from several NFC controller
(microread, nfcmrvl, nxp-nci, st21nfca, st-nci)

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