csu: Avoid additional nops in the MIPS INIT_CALL_SEQ macro
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Authored by arichardson on May 27 2020, 11:55 AM.

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rS361830: csu: Avoid additional nops in the MIPS INIT_CALL_SEQ macro

Summary

Since we had a .set reorder, the nop after the "jal" was being placed after
the delay slot, resulting in two nops.
While changing this code also guard the .set noreorder with .set push/pop
and use $zero as the cpsetup save register since we don't need to save $gp.