samples: nfc_hello: Add CONFIG_SERIAL=y to project conf

Most boards enable a serial driver by default, but the hexiwear_kw40z
does not because it uses Segger RTT for the console. This sample
requires a serial driver, so add CONFIG_SERIAL=y to its project conf
file.

Jira: ZEP-1391
Change-Id: Iee813d1054378040fe9ff72a3ca1ea7bd66bcdfe
Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
1 file changed