gcc/
	PR target/61996
	* config/sh/sh.opt (musermode): Allow negative form.
	* config/sh/sh.c (sh_option_override): Disable TARGET_USERMODE for
	targets that don't support it.
	* doc/invoke.texi (SH Options): Rename sh-*-linux* to sh*-*-linux*.
	Document -mno-usermode option.

gcc/testsuite

	PR target/61996
	* gcc.target/sh/pr61996.c: New.

From-SVN: r214406