arm64: looprestoration: Use individual ldrb for loading from the table

Before:                 Cortex A53     A72      A73
selfguided_3x3_8bpc_neon:   3260.6  2175.4   2284.6
selfguided_5x5_8bpc_neon:   2553.2  1694.4   1809.2
selfguided_mix_8bpc_neon:   5720.0  3776.8   4000.5
After:
selfguided_3x3_8bpc_neon:   3514.1  2388.5   2335.9
selfguided_5x5_8bpc_neon:   2692.2  1789.5   1835.1
selfguided_mix_8bpc_neon:   6091.1  4089.1   4083.2
21 jobs for arm64-sgr-separate-ldrb in 10 minutes and 17 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Style
passed style-check #263090
amd64 debian

00:00:26

 
  Build
passed build-debian #263091
amd64 debian

00:00:39

passed build-debian-aarch64 #263099
debian aarch64

00:01:34

passed build-debian-aarch64-clang-5 #263100
debian aarch64

00:01:07

passed build-debian-armv7 #263103
debian armv7

00:02:37

passed build-debian-armv7-clang-5 #263104
debian armv7

00:01:01

passed build-debian-static #263092
amd64 debian

00:00:39

passed build-debian-werror #263102
debian aarch64

00:00:34

passed build-debian32 #263093
amd64 debian

00:00:35

passed build-macos #263101
macos

00:00:32

passed build-ubuntu-snap #263105
amd64 debian

00:00:40

passed build-win-arm32 #263097
amd64 debian

00:00:28

passed build-win-arm64 #263098
amd64 debian

00:00:32

passed build-win32 #263094
amd64 debian

00:00:40

passed build-win32-unaligned-stack #263095
amd64 debian

00:00:35

passed build-win64 #263096
amd64 debian

00:00:49

 
  Test
passed test-debian #263106
amd64 debian

00:00:57

passed test-debian-asan #263107
amd64 debian

00:02:15

passed test-debian-msan #263108
amd64 debian

00:01:11

passed test-debian-ubsan #263109
amd64 debian

00:01:28

passed test-win64 #263110
amd64 debian

00:00:49