Changes

Summary

1. [mips] Add disassembler tests for `sigrie` instruction. NFC (details)
2. [mips] Add disassembler tests for `octeon` CPU. NFC (details)
3. [mips] Move test case for Octeon instructions to cnmips sub-folder. NFC (details)

Commit 5257a95426770540f54305b8eb369152d2d0239f by simon [mips] Add disassembler tests for `sigrie` instruction. NFC
	llvm/test/MC/Disassembler/Mips/mips64r6/valid-mips64r6.txt
	llvm/test/MC/Disassembler/Mips/mips32r6/valid-mips32r6-el.txt
	llvm/test/MC/Disassembler/Mips/mips32r6/valid-mips32r6.txt
	llvm/test/MC/Disassembler/Mips/mips64r6/valid-mips64r6-el.txt
Commit cf954e54f751742ffcbe0816a1d836fec3d9bc09 by simon [mips] Add disassembler tests for `octeon` CPU. NFC
	llvm/test/MC/Disassembler/Mips/octeon/valid.txt
	llvm/test/MC/Disassembler/Mips/octeon/valid-el.txt
Commit 52efd673692a863aa1a6195396550e97d0be8917 by simon [mips] Move test case for Octeon instructions to cnmips sub-folder. NFC
	llvm/test/MC/Mips/octeon-instructions.s
	llvm/test/MC/Mips/cnmips/valid.s