powerpc/t104xrdb: Update T1040RDB.h in config folder

powerpc/t104xrdb: Update T1040RDB.h in config folder

Add usb2 node entry in "hwconfig string"

Remove controller interleaving from hwconfig string as T1040
has only one DDR conroller

SPI related macros which were earlier under #ifdef CONFIG_SPIFLASH
are move outside so that they are defined for all cases as these
macros are also used by other u-boot code

Add CONFIG_SYS_CSPR2_EXT to make CPLD accessible

Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>
[York Sun: Minor change to commit message]
Signed-off-by: York Sun <yorksun@freescale.com>