NFC: Include nci_core.h to nci/lib.c

Include the header to pickup the exported symbol prototype.

Quites the sparse warning:

warning: symbol 'nci_to_errno' was not declared. Should it be static?

Signed-off-by: H Hartley Sweeten <[e-mail]>
Cc: Lauro Ramos Venancio <[e-mail]>
Cc: Aloisio Almeida Jr <[e-mail]>
CC: Samuel Ortiz <[e-mail]>
CC: "David S. Miller" <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

net/nfc/nci/lib.c

···
 #include <linux/errno.h>
 
 #include <net/nfc/nci.h>
+#include <net/nfc/nci_core.h>
 
 /* NCI status codes to Unix errno mapping */
 int nci_to_errno(__u8 code)