Move mips1 tests to test/MC/Disassembler/Mips/mips1

This matches the pattern of the mips2 and 3 tests, as well as our normal
conventions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224254 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/MC/Disassembler/mips1/valid-mips1-el.txt b/test/MC/Disassembler/Mips/mips1/valid-mips1-el.txt
similarity index 100%
rename from test/MC/Disassembler/mips1/valid-mips1-el.txt
rename to test/MC/Disassembler/Mips/mips1/valid-mips1-el.txt

diff --git a/test/MC/Disassembler/mips1/valid-mips1.txt b/test/MC/Disassembler/Mips/mips1/valid-mips1.txt
similarity index 100%
rename from test/MC/Disassembler/mips1/valid-mips1.txt
rename to test/MC/Disassembler/Mips/mips1/valid-mips1.txt

diff --git a/test/MC/Disassembler/mips1/valid-xfail.txt b/test/MC/Disassembler/Mips/mips1/valid-xfail.txt
similarity index 100%
rename from test/MC/Disassembler/mips1/valid-xfail.txt
rename to test/MC/Disassembler/Mips/mips1/valid-xfail.txt