arm64: dts: ti: k3-am625-beagleplay: Fix typo in ramoops reg

Seems like the address value of the reg property was mistyped.
Update reg to 0x9ca00000 to match node's definition.

Fixes: f5a731f0

 ("arm64: dts: ti: Add k3-am625-beagleplay")
Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Reviewed-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20230925151444.1856852-1-w.egorov@phytec.de


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>