dca: don't use av_clip_uintp2().

The argument is not a literal, thus causing the ARM v6 or later
builds to break.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

libavcodec/dca.c

@@ -644,7 +644,7 @@ static inline int get_scale(GetBitContext *gb, int level, int value, int log2ran
     if (level < 5) {
         /* huffman encoded */
         value += get_bitalloc(gb, &dca_scalefactor, level);
-        value = av_clip_uintp2(value, log2range);
+        value = av_clip(value, 0, (1 << log2range) - 1);
     } else if (level < 8) {
         if (level + 1 > log2range) {
             skip_bits(gb, level + 1 - log2range);