ipq40xx: add support for 8devices Jalapeno

ipq40xx: add support for 8devices Jalapeno

This patch adds support for 8devices Jalapeno.

Specification:
QCA IPQ4018, Quad core ARM v7 Cortex A7 717MHz
256 MB of DDR3 RAM
8 MB of SPI NOR flash
128 MB of Winbond SPI NAND flash
WLAN1: Qualcomm Atheros QCA4018 2.4GHz 802.11bgn 2:2x2
requires special BDF in QCA4019/hw1.0/board-2.bin with:
bus=ahb,bmi-chip-id=0,bmi-board-id=16,variant=8devices-Jalapeno
WLAN2: Qualcomm Atheros QCA4018 5GHz 802.11a/n/ac 2:2x2
requires special BDF in QCA4019/hw1.0/board-2.bin with:
bus=ahb,bmi-chip-id=0,bmi-board-id=17,variant=8devices-Jalapeno
ETH: Qualcomm Atheros QCA8072 Gigabit Switch (1 x LAN, 1 x WAN)
phy@mdio3:
Label: eth0
gmac0
phy@mdio4:
Label: eth1
gmac1

Installation instructions:
Since boards ship with old version of LEDE installation is simple.
Just use sysupgrade -n -F sysupgrade.bin

Syuspgrade needs to be forced since OpenWRT uses DT detection in recent
releases.

If you get error that FIT configuration is not found during boot it is
due to older U-boot used on your board.
That is because 8devices used custom FIT configuration partition name
as they internally had v1 and v2 boards.
Only v2 boards are sold so now they are shipping boards with never
U-boot using generic config@1 FIT partition name.

Also for old uboot it is possible to force loading config@1 by changing
uboot environment:

setenv boot5 'bootm 0x84000000#config@1’
saveenv

Signed-off-by: Robert Marko <robimarko@gmail.com>