vp10/common: apply clang-format

vp10/common/alloccommon.c

vp10/common/alloccommon.h

vp10/common/ans.h

vp10/common/arm/neon/iht4x4_add_neon.c

vp10/common/arm/neon/iht8x8_add_neon.c

vp10/common/blockd.c

vp10/common/blockd.h

vp10/common/common.h

vp10/common/common_data.h

vp10/common/debugmodes.c

vp10/common/divide.c

vp10/common/entropy.c

vp10/common/entropy.h

vp10/common/entropymode.c

vp10/common/entropymode.h

vp10/common/entropymv.c

vp10/common/entropymv.h

vp10/common/enums.h

vp10/common/filter.c

vp10/common/filter.h