am335x-bone-common: Remove SPI unused pinmux config

Remove pinmux which is not used.
The pinmux should be declared for a specific SPI configuration.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
defconfig: Enable FW build

We'll fix the problem with BBB onboard overrides properly.
Enable for now.
bone-capemgr: Force a slot to load unconditionally

Use this option to force a slot override to load unconditionally.
Useful for testing.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
beaglebone: Added Adafruit prototype cape

Added 1.8" Adafruit prototype cape using DT overlays + cape manager

Signed-off-by: Matt Ranostay <mranostay@gmail.com>