ARM: dts: omap4-panda-a4: Add missing model and compatible properties

When moving the model and compatible properties out of the common
Pandaboard files and in to the specific boards, the omap4-panda-a4
file wasn't updated as well and so has lacked a model and compatible
entry ever since.

Fixes: a1a57ab ("ARM: dts: omap4-panda: Fix model and SoC family details")
Signed-off-by: Tom Rini <trini@konsulko.com>
Link: https://lore.kernel.org/r/20250123174901.1182176-2-trini@konsulko.com
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

Author: trini

arch/arm/boot/dts/ti/omap/omap4-panda-a4.dts

@@ -7,6 +7,11 @@
 #include "omap443x.dtsi"
 #include "omap4-panda-common.dtsi"
 
+/ {
+	model = "TI OMAP4 PandaBoard (A4)";
+	compatible = "ti,omap4-panda-a4", "ti,omap4-panda", "ti,omap4430", "ti,omap4";
+};
+
 /* Pandaboard Rev A4+ have external pullups on SCL & SDA */
 &dss_hdmi_pins {
 	pinctrl-single,pins = <