configure: Remove dcbzl check for e500v1 and e500v2 architectures

The DCBZL instruction is not available for the e500v1 and e500v2
architectures, but may still be recognized by the toolchain, so we need to
remove the test for it explicitly for these architectures.

References: PowerPC™ e500 Core Family Reference Manual (Freescale)

Found-by: Ståle Kristoffersen <staalebk@ifi.uio.no>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
vp8: fix bilinear C code to work if src_stride != dst_stride.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Janne Grunau <janne-libav@jannau.net>
x86/cpu: add missing avx2 AVOption in av_parse_cpu_flags()

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  vp8: fix bilinear C code to work if src_stride != dst_stride.

See: 34b429d5ba7b823748e897f0295aa78aaa2ebb9d
Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc_filter: assert validity of qp predictor input

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc: clear tab_slice_address in hevc_frame_start()

Fixes inconsistencies
Fixes use of uninitilaized memory
Fixes part of  cb307d24befbd109c6f054008d6777b5/asan_static-oob_124a175_1445_cov_2355279992_DBLK_D_VIXS_1.bit
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc: clear tab_slice_address of ctb on error.

This allows us to detect which areas have failed to decode

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc: hls_decode_entry: check that the previous slice segment is available before decoding the next

Fixes use of uninitialized memory
Fixes out of array read
Fixes assertion failure
Fixes part of cb307d24befbd109c6f054008d6777b5/asan_static-oob_124a175_1445_cov_2355279992_DBLK_D_VIXS_1.bit
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>