The immediate value was incorrect and-ed with 3.

Also, for palignr, if the immediate is larger that 32
(for 128-bit) or 16 (for 64-bit), it produces a zero result.
In the case of disasm, I don't think we need to do anything.

Change-Id: I258fd16fbe57fa7e00ab306d0fbf1b1b73950566
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1876660Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64524}