build: move sbc related files to its own directory

This should make it easier to apply patches from BlueZ which also uses
sbc subdir for this files.

src/modules/bluetooth/sbc/sbc_primitives_neon.h

@@ -0,0 +1,40 @@
+/*
+ *
+ *  Bluetooth low-complexity, subband codec (SBC) library
+ *
+ *  Copyright (C) 2004-2009  Marcel Holtmann <marcel@holtmann.org>
+ *  Copyright (C) 2004-2005  Henryk Ploetz <henryk@ploetzli.ch>
+ *  Copyright (C) 2005-2006  Brad Midgley <bmidgley@xmission.com>
+ *
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef __SBC_PRIMITIVES_NEON_H
+#define __SBC_PRIMITIVES_NEON_H
+
+#include "sbc_primitives.h"
+
+#if defined(__GNUC__) && defined(__ARM_NEON__) && \
+		!defined(SBC_HIGH_PRECISION) && (SCALE_OUT_BITS == 15)
+
+#define SBC_BUILD_WITH_NEON_SUPPORT
+
+void sbc_init_primitives_neon(struct sbc_encoder_state *encoder_state);
+
+#endif
+
+#endif