dts: remove cris & metag dts hard link file

arch cris & metag have been removed from supported archs.
The dts hard link files should also be removed, or the ctags
tool will give warning.

execute"ctags -R", output:
ctags: Warning: cannot open source file
"scripts/dtc/include-prefixes/cris" : No such file or directory
ctags: Warning: cannot open source file
"scripts/dtc/include-prefixes/metag" : No such file or directory

Signed-off-by: Liu Changcheng <changcheng.liu@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/scripts/dtc/include-prefixes/cris b/scripts/dtc/include-prefixes/cris
deleted file mode 120000 (symlink)
index 736d998..0000000
--- a/scripts/dtc/include-prefixes/cris
+++ /dev/null
@@ -1 +0,0 @@
-../../../arch/cris/boot/dts
\ No newline at end of file

diff --git a/scripts/dtc/include-prefixes/metag b/scripts/dtc/include-prefixes/metag
deleted file mode 120000 (symlink)
index 87a3c84..0000000
--- a/scripts/dtc/include-prefixes/metag
+++ /dev/null
@@ -1 +0,0 @@
-../../../arch/metag/boot/dts
\ No newline at end of file