[Bug target/84066] Wrong shadow stack register size is saved for x32

[igor.v.tsimbalist at intel dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84066

--- Comment #4 from igor.v.tsimbalist at intel dot com ---
Created attachment 43280
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43280&action=edit
updated patch