n4.4.8
libavutil: Detect MMI and MSA flags for MIPS
libavutils: Add parse_r helper for MIPS
mips: add support for R6
avutil/mips/generic_macros_msa: Fix prob that 'ulw' and 'uld' unsupported by clang.
avutil/mips/intreadwrite: build fix for mips64r6 (instruction 'lwl' not supported)
all: Make header guard names consistent
lavu: move LOCAL_ALIGNED from internal.h to mem_internal.h