Issue: On extremely new hardware using either IceLake or super sets of
Intel IceLakes avx512 instructions, commit
d4cd8830 causes build issues.
Specifically a NASM macro expansion of qpel_filter_v is never properly
defined/initialized.

The issue is the definition was erroneously placed inside a conditional
which will not trigger unless the original definition failed (has to do
with if PIC is defined, becomes a bit of a catch 22)
Specifically the error is

X86ASM    libavcodec/x86/hevc_mc.o
libavcodec/x86/hevc_mc.asm:1854: error: symbol `..@88472.table' not defined
libavcodec/x86/hevc_mc.asm:1806: ... from macro
`HEVC_PUT_HEVC_QPEL_HV_AVX512ICL' defined here
libavcodec/x86/hevc_mc.asm:1730: ... from macro `QPEL_FILTER_V' defined here
...
repeats a few times...
...
make: *** [ffbuild/common.mak:100: libavcodec/x86/hevc_mc.o] Error 1
```
Specific error was discussed by kurosu and myself (fclc) on the
ffmpeg-devel irc.

This commit fixes the above by swapping lines 1796 and 1795, moving the
define out of the conditional

Side note: It seems fate didn't pick up on this, may merit looking into
(as mentioned by nevcairiel).
Reviewed-by: Wu Jianhua <toqsxw@outlook.com>
Signed-off-by: Felix LeClair (FCLC) <felix.leclair123@hotmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>