[Bug target/79166] [ARM] Implement neon_valid_immediate tricks for BYTES_BIG_ENDIAN

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79166

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
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           Keywords|                            |missed-optimization
             Target|                            |armeb
   Target Milestone|---                         |8.0