You could refer to the MPC8308RDB.h using the following link:
Cross Reference: /denx/u-boot/include/configs/MPC8308RDB.h
It already has NOR Flash boot setting in the "#define CONFIG_SYS_HRCW_HIGH":
HRCWH_ROM_LOC_LOCAL_16BIT |\
HRCWH_RL_EXT_LEGACY |\
DDR changes:
#define CONFIG_SYS_DDR_SIZE 256 /* MB */
#define CONFIG_SYS_DDR_CS0_BNDS 0x0000000F
NOR Flash changes:
#define CONFIG_SYS_FLASH_BASE 0xFC000000 /* FLASH base address */
#define CONFIG_SYS_FLASH_SIZE 64 /* FLASH size is 64M */
/* 512 128KB sectors per device */
#define CONFIG_SYS_MAX_FLASH_SECT 512
NAND Flash change:
Remove NAND Flash parameters