ipq40xx: ipq4019: Add new device Compex WPJ419

This device contains 2 flash devices. One NOR (32M) and one NAND (128M).
U-boot and caldata are on the NOR, the firmware on the NAND.

    SoC:    IPQ4019
    CPU:    4x 710MHz ARMv7
    RAM:    256MB
    FLASH:  NOR:32MB NAND:128MB
    ETH:    2x GMAC Gigabit
    POE:    802.3 af/at POE, IEEE802.3af/IEEE802.3at(48-56V)
    WIFI:   1x 2.4Ghz Atheros qca4019 2x2 MU-MIMO
            1x 5.0Ghz Atheros qca4019 2x2 MU-MIMO
    USB:    1x 3.0
    PCI:    1x Mini PCIe
    SIM:    1x Slot
    SD:     1x MicroSD slot
    BTN:    Reset
    LED:    - Power
            - Ethernet
    UART:  1x Serial Port 4 Pin Connector (UART)
           1x Serial Port 6 Pin Connector (High Speed UART)
    POWER: 12V 2A

Installation
------------
Initial flashing can only be done via u-boot using the following commands:

tftpboot openwrt-ipq40xx-generic-compex_wpj419-squashfs-nand-factory.ubi
nand erase.chip; nand write ${fileaddr} 0x0 ${filesize}
res

Signed-off-by: Daniel Danzberger <daniel@dd-wrt.com>