sanitycheck: allow blacklisting boards

Add new kwyboard to board definition to allow blacklisting boards. This
is needed when a board is broken causing CI to fail without a fix in
sight.

Add:

sanitycheck: false

to the board yaml file to disable the board. By default, the value is
set to true.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

scripts/sanity_chk/sanitycheck-platform-schema.yaml

@@ -32,6 +32,8 @@ mapping:
     type: int
   "flash":
     type: int
+  "sanitycheck":
+    type: bool
   "supported":
     type: seq
     seq:

scripts/sanitycheck

@@ -1311,6 +1311,7 @@ class Platform:
         data = scp.data
 
         self.name = data['identifier']
+        self.sanitycheck = data.get("sanitycheck", True)
         # if no RAM size is specified by the board, take a default of 128K
         self.ram = data.get("ram", 128)
         testing = data.get("testing", {})
@@ -1625,6 +1626,7 @@ class TestSuite:
                 verbose("Found plaform configuration " + fn)
                 try:
                     platform = Platform(fn)
+                    if platform.sanitycheck:
                         self.platforms.append(platform)
                 except RuntimeError as e:
                     error("E: %s: can't load: %s" % (fn, e))