arch/sparc: Avoid DCTI Couples

arch/sparc: Avoid DCTI Couples

Avoid un-intended DCTI Couples. Use of DCTI couples is deprecated per
Oracle SPARC Architecture notes below(Section 6.3.4.7 - DCTI Couples).

"A delayed control transfer instruction (DCTI) in the delay slot of another
DCTI is referred to as a DCTI couple. The use of DCTI couples is deprecated
in the Oracle SPARC Architecture; no new software should place a DCTI in
the delay slot of another DCTI, because on future Oracle SPARC Architecture
implementations DCTI couples may execute either slowly or differently than
the programmer assumes it will."

Orabug: 25456049

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Reviewed-by: Rob Gardner <rob.gardner@oracle.com>
Signed-off-by: Allen Pais <allen.pais@oracle.com>