ARM: dts: ti: omap: am335x-baltos: drop "gpmc,device-nand" from NAND node

"gpmc,device-nand" is not used any more and leads to below dtbs_check
warning so drop it.

"nand@0,0: Unevaluated properties are not allowed ('gpmc,device-nand' was unexpected)"

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240903-gpmc-dtb-v1-2-380952952e34@kernel.org


Signed-off-by: Kevin Hilman <khilman@baylibre.com>