drm/msm: drop interrupt-names

Each GPU core only uses one interrupt so we don't to look up
an interrupt by name and thereby we don't need interrupt-names.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

Documentation/devicetree/bindings/display/msm/gpu.txt

@@ -27,7 +27,6 @@ Example:
 		reg = <0x04300000 0x20000>;
 		reg-names = "kgsl_3d0_reg_memory";
 		interrupts = <GIC_SPI 80 0>;
-		interrupt-names = "kgsl_3d0_irq";
 		clock-names =
 		    "core",
 		    "iface",