Please refer to the QorIQ LS1021A Reference Manual, Table 9-2. Required format of data structure used by PBL, note 2:
"SYS_ADDR = 0x61_0040 is a PBI CRC check command (PBL block base address 0x161_0000, but only 24-bits address are used here)."
Also consider that "write" in PBI corresponds to the ACS=0 (CCSR space) and "awrite" corresponds to the ACS=1.