ARM: dts: ti: omap3434-sdp: drop linux,mtd-name from onenand node

linux,mtd-name is only applicable for PHYSMAP driver and not for
OneNAND.

Fixes the below dtbs_check warning

"omap3430-sdp.dtb: onenand@2,0: Unevaluated properties are not allowed ('linux,mtd-name' was unexpected)"

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240903-gpmc-dtb-v1-3-380952952e34@kernel.org


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