arm64: dts: realtek: rtd129x: Carve out boot ROM from memory

Update DS418j, MeLE V9, PROBOX2 AVA, Zidoo X9S and DS418 /memory nodes
to exclude 0..0x1efff from reg entry and update unit address to match.
Add this region to /soc ranges and for now just update the /memreserve/s.

Suggested-by: Rob Herring <robh@kernel.org>
Fixes: 72a7786c ("ARM64: dts: Add Realtek RTD1295 and Zidoo X9S")
Fixes: d938a964 ("arm64: dts: realtek: Add ProBox2 Ava")
Fixes: a9ce6f85 ("arm64: dts: realtek: Add MeLE V9")
Fixes: cf976f66 ("arm64: dts: realtek: Add RTD1293 and Synology DS418j")
Fixes: 5133636e ("arm64: dts: realtek: Add RTD1296 and Synology DS418")
Cc: James Tai <james.tai@realtek.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>