Revert "8-bit jumper on armv8"

This reverts commit 08133583d5e1cdfdcc41b4bb078fcfb64137f058.

Reason for revert: Blocking Android Autoroller on compile error.

Original change's description:
> 8-bit jumper on armv8
> 
> The GM diffs are all minor and what you'd expect.
> 
> I did a quick performance sanity check, which also looks fine.
> 
>   $ out/ok bench rp filter:search=Modulate
>     [blendmode_rect_Modulate] 30.2ms  @0  32ms    @95 32ms    @100
>     [blendmode_mask_Modulate] 12.6ms  @0  12.6ms  @95 14.5ms  @100
>   ~~~>
>     [blendmode_rect_Modulate] 11.2ms  @0  11.7ms  @95 12.4ms  @100
>     [blendmode_mask_Modulate] 10.5ms  @0  23.6ms  @95 23.9ms  @100
> 
> This isn't even really the fastest we can make 8-bit go on ARMv8;
> it's actually much more natural to work de-interlaced there.  Lots
> of room to follow up.
> 
> Change-Id: I86b1099f6742bcb0b8b4fa153e85eaba9567cbf7
> Reviewed-on: https://skia-review.googlesource.com/39740
> Reviewed-by: Florin Malita <fmalita@chromium.org>
> Commit-Queue: Mike Klein <mtklein@chromium.org>

TBR=mtklein@chromium.org,herb@google.com,fmalita@chromium.org,reed@google.com

Change-Id: I71425d8b7fbb66be5cb50025871dd81358111da4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/39980
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Derek Sollenberger <djsollen@google.com>
4 files changed