scripts: build-all.py: set clang as REAL_CC for arm

To support LLVM for arm, set REAL_CC to clang
which overrides gcc.
All the defconfigs we care about should be in
arch/arm/configs/vendor/ so remove the pattern-based
detection logic for arm.

Change-Id: Id48890e0d7b3ee5a37fe1a6ea2ae762bdd65eeec
Signed-off-by: Rahul Shahare <rshaha@codeaurora.org>
diff --git a/scripts/build-all.py b/scripts/build-all.py
index 33721ac..ee1c34e 100755
--- a/scripts/build-all.py
+++ b/scripts/build-all.py
@@ -268,18 +268,11 @@
 
         # Build targets can be dependent upon the completion of
         # previous build targets, so build them one at a time.
-        if os.environ.get('ARCH') == "arm64":
-            cmd_line = ['make',
-                'INSTALL_HDR_PATH=%s' % hdri_dir,
-                'INSTALL_MOD_PATH=%s' % modi_dir,
-                'O=%s' % dest_dir,
-                'REAL_CC=%s' % clang_bin]
-        else:
-            cmd_line = ['make',
-                'INSTALL_HDR_PATH=%s' % hdri_dir,
-                'INSTALL_MOD_PATH=%s' % modi_dir,
-                'O=%s' % dest_dir]
-
+        cmd_line = ['make',
+            'INSTALL_HDR_PATH=%s' % hdri_dir,
+            'INSTALL_MOD_PATH=%s' % modi_dir,
+            'O=%s' % dest_dir,
+            'REAL_CC=%s' % clang_bin]
         build_targets = []
         for c in make_command:
             if re.match(r'^-{1,2}\w', c):
@@ -294,18 +287,6 @@
 def scan_configs():
     """Get the full list of defconfigs appropriate for this tree."""
     names = []
-    arch_pats = (
-        r'[fm]sm[0-9]*_defconfig',
-        r'apq*_defconfig',
-        r'qsd*_defconfig',
-        r'mpq*_defconfig',
-        r'sdm*_defconfig',
-        r'sdx*_defconfig',
-        )
-    for p in arch_pats:
-        for n in glob.glob('arch/arm/configs/' + p):
-            name = os.path.basename(n)[:-10]
-            names.append(Builder(name, n))
     for defconfig in glob.glob('arch/arm*/configs/vendor/*_defconfig'):
         target = os.path.basename(defconfig)[:-10]
         name = target + "-llvm"