ARM: dts: msm: Add ERP device definition on msmcobalt

Add a device definition for the CPU Error Reporting
hardware on msmcobalt, to allow hardware errors to be
reported to software.

Change-Id: Icd6f08a8e7ddeceafb3a02a1dfa4c64f23f285b5
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>