NFC: st-nci: Replace st21nfcb by st_nci in makefile

Replace 1 missing st21nfcb by st_nci
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/st-nci/Makefile

 #
-# Makefile for ST21NFCB NCI based NFC driver
+# Makefile for ST_NCI NCI based NFC driver
 #
 
 st-nci-objs = ndlc.o core.o se.o vendor_cmds.o