arm64: dts: renesas: Rename DTB overlay source files from .dts to .dtso

DTB Overlays (.dtbo) can now be built from source files with the
extension (.dtso). This makes it clear what is the content of the files
and differentiates them from base DTB source files.

Convert the DTB overlay source files in the arm64/renesas directory.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20221024173434.32518-6-afd@ti.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/draak-ebisu-panel-aa104xd12.dts b/arch/arm64/boot/dts/renesas/draak-ebisu-panel-aa104xd12.dtso
similarity index 100%
rename from arch/arm64/boot/dts/renesas/draak-ebisu-panel-aa104xd12.dts
rename to arch/arm64/boot/dts/renesas/draak-ebisu-panel-aa104xd12.dtso

diff --git a/arch/arm64/boot/dts/renesas/salvator-panel-aa104xd12.dts b/arch/arm64/boot/dts/renesas/salvator-panel-aa104xd12.dtso
similarity index 100%
rename from arch/arm64/boot/dts/renesas/salvator-panel-aa104xd12.dts
rename to arch/arm64/boot/dts/renesas/salvator-panel-aa104xd12.dtso