samples: cellular: fmfu_smp_svr: Enable CRC in the sample

Enable CONFIG_CRC, which is a dependency for mcumgr UART transport.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>

Author: rlubos

samples/cellular/fmfu_smp_svr/prj.conf

@@ -32,6 +32,7 @@ CONFIG_MAIN_STACK_SIZE=2048
 # Enable the UART mcumgr transports.
 CONFIG_MCUMGR_TRANSPORT_UART=y
 CONFIG_BASE64=y
+CONFIG_CRC=y
 CONFIG_UART_MCUMGR_RX_BUF_SIZE=512
 CONFIG_MCUMGR_TRANSPORT_NETBUF_SIZE=512