The pcs error count should be determined by PCS ERROR status and
PCS ERROR MASK registers, only PCS ERROR status register can not
refect error counts accurately.

Changed from V1:
	remove clean noncorrectable mask registers
	optimize query pcs error status

Changed from V2:
	remove check mask_value bits
	correct set value corresponding bit
Signed-off-by: Stanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>