layerscape: update memory layout according to LSDK

layerscape: update memory layout according to LSDK

The uniform memory layout of NOR/QSPI/NAND/SD media on all Layerscape platforms:
+-----------------------------+---------|--------------|-----------------+
|Firmwre Definition           | MaxSize | Flash Offset | SD Start Block #|
|-----------------------------|---------|--------------|-----------------|
|RCW+PBI                      | 1MB     | 0x00000000   | 0x00008         |
|-----------------------------|---------|--------------|-----------------|
|Boot firmware(U-Boot,UEFI)   | 2MB     | 0x00100000   | 0x00800         |
|-----------------------------|---------|--------------|-----------------|
|Boot firmware Environment    | 1MB     | 0x00300000   | 0x01800         |
|-----------------------------|---------|--------------|-----------------|
|PPA firmware                 | 2MB     | 0x00400000   | 0x02000         |
|-----------------------------|---------|--------------|-----------------|
|Secure boot headers          | 3MB     | 0x00600000   | 0x03000         |
|-----------------------------|---------|--------------|-----------------|
|DPAA1 FMAN ucode             | 256KB   | 0x00900000   | 0x04800         |
|-----------------------------|---------|--------------|-----------------|
|QE/uQE firmware              | 256KB   | 0x00940000   | 0x04A00         |
|-----------------------------|---------|--------------|-----------------|
|Ethernet PHY firmware        | 256KB   | 0x00980000   | 0x04C00         |
|-----------------------------|---------|--------------|-----------------|
|Scripts                      | 256KB   | 0x009C0000   | 0x04E00         |
|-----------------------------|---------|--------------|-----------------|
|DPAA2 MC firmware            | 3MB     | 0x00A00000   | 0x05000         |
|-----------------------------|---------|--------------|-----------------|
|DPAA2 DPL                    | 1MB     | 0x00D00000   | 0x06800         |
|-----------------------------|---------|--------------|-----------------|
|DPAA2 DPC                    | 1MB     | 0x00E00000   | 0x07000         |
|-----------------------------|---------|--------------|-----------------|
|Device tree(needed by uefi)  | 1MB     | 0x00F00000   | 0x07800         |
|-------------+---------------|---------|--------------|-----------------|
|Kernel       |               | 16MB    | 0x01000000   | 0x08000         |
|-------------| kernel.itb    |---------|--------------|-----------------|
|Ramdisk rfs  |               |32MB     | 0x01100000   | 0x08800         |
+-------------+---------------+---------|--------------|-----------------+

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>