Update README files.

boards/arm/s32k1xx/s32k118evb/README.txt

@@ -20,8 +20,10 @@ Status
     to support development of the architecture support.  This is VERY much
     a work in progress and you should not use this configuration unless you
     are interested in assisting with the bring-up.
+
   2019-08-17:  The port is code complete.  It compiles with no errors or
     warnings but is untested.  Still waiting for hardware.
+
   2019-08-20:  I have the board and started the debug.  However, the
     very first image that I wrote to FLASH seems to have "bricked" the
     board.  I believe that the S32K118 resets into a bad state and
@@ -29,6 +31,10 @@ Status
     the world.  I will continuing the bring-up using the S32K146EVB
     where I can run from SRAM for the initial bring-up.
 
+    These bring-up issues were addressed with S32K146EVB.  It is not probably
+    safe to try the S32K118EVB again (if I can figure out how to break into
+    my bricked system).
+
 Serial Console
 ==============
 

boards/arm/s32k1xx/s32k146evb/README.txt

@@ -21,9 +21,13 @@ Status
     not yet been tested.  This is VERY much a work in progress and you
     should not use this configuration unless you are interested in
     assisting with the bring-up.
+
   2019-08-20:  Initial testing, I am running out of SRAM to avoid the
     brickage problems I had with the S32K118EVB (i.e., with
-    CONFIG_BOOT_RUNFROMISRAM=y)
+    CONFIG_BOOT_RUNFROMISRAM=y).
+
+    The NSH configuration now appears work correctly.  Only verified when
+    running SRAM at present.
 
 Serial Console
 ==============