ARM: dts: dra7-evm: remove interrupt binding

The qspi node defines crossbar number as its interrupt number. But,
the crossbar dts patches are not yet there, this causes a warning during
boot.  So interrupts = < > property should be removed from DT and added
later by crossbar series.
Reported-by: Sricharan R <r.sricharan@ti.com>
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7.dtsi

@@ -773,7 +773,6 @@ qspi: qspi@4b300000 {
 			clocks = <&qspi_gfclk_div>;
 			clock-names = "fck";
 			num-cs = <4>;
-			interrupts = <0 343 0x4>;
 			status = "disabled";
 		};