* config/m32r/m32r.c: Convert to ISO-C
* doc/invoke.texi: Replace Mitsubishi with Renesas.
* config/m32r/m32r.h: Ditto.
* config/m32r/m32r.c: Ditto.
* config/m32r/m32r.md: Ditto.

From-SVN: r74533