Set RC=1 when only polling for T3T.

According to the NFC Forum Activity spec, controllers must:
1) Poll with RC=0 and SC=FFFF to find NFC-DEP targets
2) Poll with RC=1 and SC=FFFF to find T3T targets

Many controllers don't do this yet, and seem to be
activating NFC-DEP by default.
We can at least fix the scenario where we're not interested
in NFC-DEP, by setting RC=1 in that case. Otherwise, keep
the default of RC=0.

Change-Id: Icc27950c38bf0b0a10fc1325e85e4a526557b641

• src/hal/include/nci_defs.h[diff]
• src/nfa/dm/nfa_dm_discover.c[diff]
• src/nfa/dm/nfa_dm_main.c[diff]
• src/nfa/int/nfa_dm_int.h[diff]
• src/nfc/include/nfc_api.h[diff]