Merged in rzr/nuttx/sandbox/rzr/review/master (pull request #817)

stm32: Align ethernet config name to netnsh

nsh-ethernet was only used for stm32f7*-disco,
other configurations with network enabled are commonly
named netnsh or derived: (eg: nucleo-144/f7670-netnsh)

Change-Id: I80a33c8e22fbc7ccc9caf6b483478ae2c3a075ad
Signed-off-by: Philippe Coval <p.coval@samsung.com>

Approved-by: GregoryN <gnutt@nuttx.org>

configs/stm32f746g-disco/README.txt

@@ -509,11 +509,11 @@ Configuration Directories
     built-in applications is enabled, but in the base configuration no
     built-in applications are selected.
 
-  nsh-ethernet
-  ------------
+  netnsh
+  ------
     This configuration is similar to the nsh but a lot more hardware
     peripherals are enabled, in particular Ethernet, as well as networking
-    support.  It is similar to the stm32f769i-disco/nsh-ethernet
+    support.  It is similar to the stm32f769i-disco/netnsh
     configuration. This configuration uses USART1 for the serial console.
     USART1 is connected to the ST-link virtual com inside board.h to remove
     the need of a extra serial connection to use this board.