Documentation: add (nim)ble on esp32c3

Modify documentation of esp32c3 and add nimble section to
esp32c3-generic.

Signed-off-by: Laczen JMS <laczenjms@gmail.com>

Documentation/platforms/risc-v/esp32c3/boards/esp32c3-generic/index.rst

@@ -208,6 +208,18 @@ You can scan for all I2C devices using the following command::
 
     nsh> i2c dev 0x00 0x7f
 
+nimble
+------
+
+This configuration can be used to test ble using the nimble library. The
+``nimble`` example starts advertising and can be connected to or disconnected
+from. Before starting the ``nimble`` example make sure the bnep0 interface is
+up by issuing::
+
+    nsh> ifup bnep0
+    ifup bnep0...OK
+    nsh> nimble &
+
 nsh
 ---
 

Documentation/platforms/risc-v/esp32c3/index.rst

@@ -287,7 +287,7 @@ Peripheral  Support NOTES
 =========== ======= ====================
 ADC          No
 AES          No
-Bluetooth    No
+Bluetooth    Yes
 CAN/TWAI     Yes
 CDC Console  Yes    Rev.3
 DMA          Yes