ARM: dts: bcm5301x: Add SEAMA compatibles

This adds SEAMA compatibles to the firmware partition of these
two D-Link devices.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230713-seama-partitions-v4-2-69e577453d40@linaro.org


Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>