Fix some cloned errors in SAM GPIO interrupt setup

examples/cc3000/cc3000basic.c

@@ -806,7 +806,7 @@ void ListAccessPoints(void)
 
   printf("List visible access points\n");
 
-  printf("  Setting scan paramters...\n");
+  printf("  Setting scan parameters...\n");
 
   for (i=0; i<NUM_CHANNELS; i++)
     {

nshlib/README.txt

@@ -695,7 +695,7 @@ o mkrd [-m <minor>] [-s <sector-size>] <nsectors>
 o mount [-t <fstype> <block-device> <dir-path>]
 
   The mount command performs one of two different operations.  If no
-  paramters are provided on the command line after the mount command,
+  parameters are provided on the command line after the mount command,
   then the 'mount' command will enumerate all of the current
   mountpoints on the console.
 

nshlib/nsh_parse.c

@@ -1203,7 +1203,7 @@ static FAR char *nsh_argexpand(FAR struct nsh_vtbl_s *vtbl, FAR char *cmdline,
 
       *rptr = '\0';
 
-      /* Then execute the command to get the paramter value */
+      /* Then execute the command to get the parameter value */
 
       argument = nsh_cmdparm(vtbl, cmdline + 1, allocation);
     }