rasdaemon: Do't process Ampere specific error in the public code

[winterddd]

Ampere specific error info and error handler need to included in HAVE_AMP_NS_DECODE macro.

[axiqia]

@winterddd pei_len can not decode because it is Ampere specific error.

Dec 04 11:38:42 xxxx rasdaemon[55843]: <idle>-0     [044]     0.041739: arm_event:            2023-12-04 11:38:41 +0800
Dec 04 11:38:42 xxxx rasdaemon[55843]: affinity: -1
Dec 04 11:38:42 xxxx rasdaemon[55843]: MPIDR: 0x812c0000
Dec 04 11:38:42 xxxx rasdaemon[55843]: MIDR: 0x410fd490
Dec 04 11:38:42 xxxx rasdaemon[55843]: running_state: 1
Dec 04 11:38:42 xxxx rasdaemon[55843]: psci_state: 0<CANT FIND FIELD pei_len>affinity level: 255; MPIDR: 00000000812c0000; MIDR: 00000000410fd490; running state: 1; PSCI state: 0

Could you please add details about the problem we met in commit log, so that the maintainer will see why we need this patch.