ARM errata corrections

[Shinya Kuribayashi]

Hello Catalin, Will (and Dave, may be interested in),

I've been holding these two patches at hand for more than a year, but
don't want to any further.  This kind of errata updates can be easily
overlooked, or even if proper patches are prepared, it is so easy to
forget to up-port them when upgrading the kernels.

I believe we have many r2pX Cortex-A9 MPcore silicons out there.  Let's
get them corrected in the master.

Could you take a look please?
-- 
Shinya Kuribayashi
Renesas Electronics