[U-Boot] [PATCH 02/09] powerpc/mpc85xx:Add support of B4420 SoC

B4420 is a reduced personality of B4860 with fewer core/clusters(both SC3900 and e6500), fewer DDR controllers, fewer serdes lanes, fewer SGMII interfaces and reduced target frequencies. Key differences between B4860 and B4420 B4420 has: 1. Fewer e6500 cor

[U-Boot] [PATCH 02/09] powerpc/mpc85xx:Add support of B4420 SoC

B4420 is a reduced personality of B4860 with fewer core/clusters(both SC3900 and e6500), fewer DDR controllers, fewer serdes lanes, fewer SGMII interfaces and reduced target frequencies. Key differences between B4860 and B4420 B4420 has: 1. Fewer e6500 cor