arm: looprestoration: Fix register shifting at the end of a vertical run

This uses the right registers, corresponding to the ones shifted
in the arm64 version.
18 jobs for master in 6 minutes and 46 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Style
passed #251318
amd64 debian
style-check

00:00:22

 
  Build
passed #251319
amd64 debian
build-debian

00:00:33

passed #251326
debian aarch64
build-debian-aarch64

00:01:30

passed #251327
debian aarch64
build-debian-aarch64-clang-5

00:01:02

passed #251330
debian armv7
build-debian-armv7

00:01:30

passed #251331
debian armv7
build-debian-armv7-clang-5

00:01:03

passed #251320
amd64 debian
build-debian-static

00:00:36

passed #251329
debian aarch64
build-debian-werror

00:00:32

passed #251321
amd64 debian
build-debian32

00:00:26

passed #251328
macos
build-macos

00:00:30

passed #251324
win32
build-win-arm32

00:00:27

passed #251325
win64
build-win-arm64

00:00:27

passed #251322
win32
build-win32

00:00:33

passed #251323
win64
build-win64

00:00:36

 
  Test
passed #251332
amd64 debian
test-debian

00:00:49

passed #251333
amd64 debian
test-debian-asan

00:01:58

passed #251334
amd64 debian
test-debian-msan

00:01:03

passed #251335
amd64 debian
test-debian-ubsan

00:01:23