arm64: dts: ti: k3-am6: Remove unused ti,gp-rings from ringacc nodes

The ti,gp-rings is deprecated and the range must be queried via tisci RM
API.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

arch/arm64/boot/dts/ti/k3-am65-main.dtsi

@@ -143,7 +143,6 @@
 			reg-names = "rt", "fifos", "proxy_gcfg", "proxy_target";
 			ti,num-rings = <818>;
 			ti,sci-rm-range-gp-rings = <0x2>; /* GP ring range */
-			ti,gp-rings = <304 464>; /* start, cnt */
 			ti,dma-ring-reset-quirk;
 			ti,sci = <&dmsc>;
 			ti,sci-dev-id = <187>;

arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi

@@ -60,7 +60,6 @@
 			reg-names = "rt", "fifos", "proxy_gcfg", "proxy_target";
 			ti,num-rings = <286>;
 			ti,sci-rm-range-gp-rings = <0x2>; /* GP ring range */
-			ti,gp-rings = <96 255>; /* start, cnt */
 			ti,dma-ring-reset-quirk;
 			ti,sci = <&dmsc>;
 			ti,sci-dev-id = <195>;