arch/arm/rtl8721f: enable on-chip flash filesystem and WiFi networking

Bring up the last two RTL8721F feature blocks and wire them into the
nsh board configuration:

- littlefs on the on-chip flash MTD region (P2).
- WHC/INIC WiFi with the on-chip IPC control plane, NuttX net stack,
  DHCP client and the wapi command tool (P3).

Two porting fixes were required for the WiFi control plane:

- ameba_ipc.c: the AP IPC device base (IPCAP_DEV) was carried over
  verbatim from the RTL8720F template (0x40804000).  On this SoC IPC0
  lives at 0x40815000; using the wrong base makes ipc_table_init()
  program the RX-full mask in the wrong register block, so the NP->AP
  interrupt never fires and WiFi bring-up hangs waiting for the device
  to answer.  Point IPCAP_DEV at the correct 0x40815000 base.

- ameba_board.mk: the EVB silicon is B-cut, so link against the
  ameba_rom_symbol_bcut*.ld ROM symbol tables (the A-cut tables resolve
  the WiFi ROM helpers to the wrong addresses and fault at run time).

Validated on hardware: NSH comes up, wapi scan lists real APs, a WPA2
connect succeeds, the DHCP client obtains a lease and ICMP to the
public internet round-trips.

The board defconfig keeps SSID/passphrase as placeholders; real
credentials are supplied at run time via the wapi commands.

Signed-off-by: dechao_gong <dechao_gong@realsil.com.cn>

boards/arm/rtl8721f/rtl8721f_evb/configs/nsh/defconfig

@@ -20,19 +20,56 @@ CONFIG_DEBUG_FEATURES=y
 CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DEFAULT_TASK_STACKSIZE=4096
+CONFIG_DRIVERS_IEEE80211=y
+CONFIG_DRIVERS_WIRELESS=y
+CONFIG_EXAMPLES_DHCPD=y
 CONFIG_EXAMPLES_HELLO=y
 CONFIG_FS_PROCFS=y
 CONFIG_FS_TMPFS=y
 CONFIG_IDLETHREAD_STACKSIZE=4096
 CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_IOB_BUFSIZE=512
+CONFIG_IOB_NBUFFERS=100
+CONFIG_IOB_NCHAINS=36
+CONFIG_IOB_THROTTLE=40
+CONFIG_LIBC_MEMFD_ERROR=y
 CONFIG_MM_DEFAULT_ALIGNMENT=32
+CONFIG_NET=y
+CONFIG_NETDB_DNSCLIENT=y
+CONFIG_NETDEV_LATEINIT=y
+CONFIG_NETDEV_WIRELESS_IOCTL=y
+CONFIG_NETINIT_DHCPC=y
+CONFIG_NETINIT_THREAD=y
+CONFIG_NETINIT_WAPI_PASSPHRASE="YOUR_WIFI_PASSWORD"
+CONFIG_NETINIT_WAPI_SSID="YOUR_WIFI_SSID"
+CONFIG_NETUTILS_DHCPD=y
+CONFIG_NETUTILS_DHCPD_ROUTERIP=0xc0a80401
+CONFIG_NETUTILS_DHCPD_STARTIP=0xc0a80402
+CONFIG_NETUTILS_IPERF=y
+CONFIG_NET_ARP_IPIN=y
+CONFIG_NET_BROADCAST=y
+CONFIG_NET_ETH_PKTSIZE=1514
+CONFIG_NET_ICMP_SOCKET=y
+CONFIG_NET_RECV_BUFSIZE=10000
+CONFIG_NET_SEND_BUFSIZE=16384
+CONFIG_NET_TCP=y
+CONFIG_NET_TCP_DELAYED_ACK=y
+CONFIG_NET_TCP_KEEPALIVE=y
+CONFIG_NET_TCP_NOTIFIER=y
+CONFIG_NET_TCP_OUT_OF_ORDER=y
+CONFIG_NET_TCP_OUT_OF_ORDER_BUFSIZE=10000
+CONFIG_NET_TCP_WRITE_BUFFERS=y
+CONFIG_NET_UDP=y
 CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_DISABLE_VCONFIG=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
 CONFIG_PREALLOC_TIMERS=4
 CONFIG_RAM_SIZE=401408
 CONFIG_RAM_START=0x20006000
 CONFIG_RR_INTERVAL=200
+CONFIG_RTL8721F_FLASH_FS=y
+CONFIG_RTL8721F_WIFI=y
 CONFIG_SCHED_HPWORK=y
 CONFIG_SCHED_HPWORKPRIORITY=192
 CONFIG_SCHED_LPWORK=y
@@ -41,8 +78,13 @@ CONFIG_STACK_COLORATION=y
 CONFIG_START_DAY=16
 CONFIG_START_MONTH=6
 CONFIG_START_YEAR=2026
+CONFIG_SYSTEM_DHCPC_RENEW=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_SYSTEM_NSH_STACKSIZE=2500
+CONFIG_SYSTEM_PING=y
 CONFIG_TIMER=y
 CONFIG_TIMER_ARCH=y
 CONFIG_USEC_PER_TICK=1000
+CONFIG_WIRELESS=y
+CONFIG_WIRELESS_WAPI=y
+CONFIG_WIRELESS_WAPI_CMDTOOL=y