Hi,

This patch maintains Marvell PJ4 cores pipeline description.
Run arm testsuite on arm-linux-gnueabi and no extra regressions are found.

        * config/arm/marvell-pj4.md: New marvell-pj4 pipeline description.
        * config/arm/arm.c (arm_issue_rate): Add marvell_pj4.
        * config/arm/arm-cores.def: Add core marvell-pj4.
        * config/arm/arm-tune.md: Regenerated.
        * config/arm/arm-tables.opt: Regenerated.
        * doc/invoke.texi: Added entry for marvell-pj4.


Thanks!

P.S. I create the patch from revision 187308, but this revision is unable to build successfully, then I apply this patch to revision 187623 and successfully build and pass the testsuite.