When the hardware revision is not passed explicitly as a module parameter, the probe now reads the
board EEPROM to discover the hardware revision.

mangOH Red prior to DV5 were pre-production boards. These configurations
haven't been tested or maintained in a long time, so it's better to
remove support for them so that users don't get the false impression
that they are supported.

The yellow_* targets all build successfully using the latest toolchains
so enable building for yellow under the "all" target.

Move the CAN IoT card fragment into a .sinc file to de-clutter the main
SDEF file.

Replace references to MANGOH_CAN_9X15 with MANGOH_WP_CHIPSET_9X15 and
eliminate the MANGOH_CAN_9X15 variable. There is no neet to have a
CAN-specific variable for chipset identification.

As of WP85/WP75 Release 16, all WP modules support the MT7697 based WiFi
on the mangOH Red board and thus it is no longer necessary to
distinguish between the modules when deciding what is included in the
mangOH.sdef.

WP85/75 release 16 properly supports the battery service, so the #if
statement in the SDEF can be removed and the battery service can be
included for the mangOH Red regardless of which module is being used.

IioDeviceList is a simple application which demonstrates how to use the
shared libiio component to enumerate the IIO devices avaialble in the
system.

This app applies to a sensor which is not included on any mangOH.

An at24 eeprom device is created from the mangOH red kernel module. The
eeprom contents can be read from /sys/bus/i2c/devices/0-0051/eeprom.

rtc-pcf85063 is an I2C RTC chip that exists on the mangOH Yellow. This
driver was copied from the mainline Linux kernel. rtc_sync is a kernel
module that sets the system time from rtc1 when the module is loaded and
then periodically syncs the system time to the RTC if the system time is
changed.

Prior to Legato 18.07.0, there was bug (LE-10550) in Legato which caused
the supervisor to get stuck in an infinite loop if two different mdefs
included in a system depended on the same mdef.  As a workaround the
dependency of bmp280.mdef on iio-kfifo-buf.mdef was commented out.  Now
that this bug is resolved, the dependency can be restored.

Remove spisvc from the mangOH SDEF since the default.sdef from Legato
18.07.0 includes spisvc and mangOH.sdef includes default.sdef indirectly
via wifi.sdef.