tests/tcg: move MIPS specific tests into subdir

These only need to be built for MIPS guests.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

tests/tcg/README

@@ -3,17 +3,6 @@ regression testing. Tests are either multi-arch, meaning they can be
 built for all guest architectures that support linux-user executable,
 or they are architecture specific.
 
-
-
-MIPS
-====
-
-hello-mips
-----------
-
-hello-mipsel
-------------
-
 CRIS
 ====
 The testsuite for CRIS is in tests/tcg/cris.  You can run it

tests/tcg/mips/README

@@ -0,0 +1,7 @@
+MIPS
+====
+
+hello-mips
+----------
+
+A very simple inline assembly, write syscall based hello world