Revert "sanitycheck: reduce number of unnecessary configuration builds"

This reverts commit 4e2cf33.

The change does not work correct if we have a filter and specify a
specific platform, such as:

./scripts/sanitycheck -p 96b_nitrogen -i -s samples/hello_world/test_singlethread

Change-Id: I43a4f25ed25c8fe5379cda23b6dbfa8f9ae5cb0d
Signed-off-by: Kumar Gala <[email protected]>

Author: galak

scripts/sanitycheck

@@ -1324,7 +1324,7 @@ class TestSuite:
                     if tc.platform_whitelist and plat.name not in tc.platform_whitelist:
                         continue
 
-                    if tc.tc_filter and (plat in arch.platforms[:platform_limit] or all_plats):
+                    if tc.tc_filter:
                         args = tc.extra_args[:]
                         args.extend(["ARCH=" + plat.arch.name,
                                 "BOARD=" + plat.name, "initconfig"])