Fix wrong MacroAssembler instruction in
kArchCallWasmFunction, which caused over
1000 tests to fail.

Bug: 
Change-Id: I5730f33ec2253d2d5dfaf8a8e6d5414f0668b4bd
Reviewed-on: https://chromium-review.googlesource.com/866498Reviewed-by: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#50567}