vp10/encoder: apply clang-format

vp10/encoder/aq_complexity.c

vp10/encoder/aq_complexity.h

vp10/encoder/aq_cyclicrefresh.c

vp10/encoder/aq_cyclicrefresh.h

vp10/encoder/aq_variance.c

vp10/encoder/aq_variance.h

vp10/encoder/arm/neon/dct_neon.c

vp10/encoder/arm/neon/error_neon.c

vp10/encoder/arm/neon/quantize_neon.c

vp10/encoder/bitstream.c

vp10/encoder/bitstream.h

vp10/encoder/block.h

vp10/encoder/blockiness.c

vp10/encoder/buf_ans.h

vp10/encoder/context_tree.c

vp10/encoder/cost.c

vp10/encoder/cost.h

vp10/encoder/dct.c

vp10/encoder/encodeframe.c

vp10/encoder/encodeframe.h