ath79: add support for D-Link DIR-842 C1
Hardware spec of DIR-842 C1:
SoC: QCA9563
DRAM: 128MB DDR2
Flash: 16MB SPI-NOR
Switch: QCA8337N
WiFi 5.8GHz: QCA9888
WiFi 2.4Ghz: QCA9563
USB: circuit onboard, but components are not soldered
Flash instructions:
1. Upgrade the factory.bin through the factory web interface or
the u-boot failsafe interface.
The firmware will boot up correctly for the first time.
Do not power off the device after OpenWrt has booted.
Otherwise the u-boot will enter failsafe mode as the checksum
of the firmware has been changed.
2. Upgrade the sysupgrade.bin in OpenWrt.
After upgrading completes the u-boot won't complain about the
firmware checksum and it's OK to use now.
3. If you powered off the device before upgrading the sysupgrade.bin,
just upgrade the factory.bin through the u-boot failsafe interface
and then goto step 2.
Signed-off-by: Jackson Lim <jackcolentern@gmail.com>
[fix whitespace issues]
Signed-off-by: David Bauer <mail@david-bauer.net>