m68k: Rename icache_invalid to invalidate_icache_all

The implementation of icache_invalid appears to be doing what other
architectures call invalidate_icache_all so rename to match.

Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
3 files changed