drm/amd/ras: Fix SMU EEPROM record field decoding

drm/amd/ras: Fix SMU EEPROM record field decoding

The SMU EEPROM read paths pass byte-sized record field addresses
to mca_ipid_parse(), whose outputs are u32 pointers.

Writing through those widened pointers can clobber adjacent fields
and bytes beyond the record storage.

Parse the IPID values into local u32 temporaries instead, then
explicitly narrow the values when storing them in the EEPROM record.

Signed-off-by: Xiang Liu <xiang.liu@amd.com>
Reviewed-by: Stanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>