* doc/extend.texi: Add ip2k port to description of attribute

	* doc/extend.texi: Add ip2k port to description of attribute
	naked.
	* doc/install.texi (Specific): Add ip2k description.
	* doc/install-old.texi (Configurations): Add ip2k to possible
	cpu types.
	* doc/md.texi: Document ip2k constraints.
	* config/ip2k/crt0.S: New file.
	* config/ip2k/ip2k-protos.h: New file.
	* config/ip2k/ip2k.c: New file.
	* config/ip2k/ip2k.h: New file.
	* config/ip2k/ip2k.md: New file.
	* config/ip2k/libgcc.S: New file.
	* config/ip2k/t-ip2k: New file.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@55122 138bc75d-0d04-0410-961f-82ee72b054a4