gem5: dts: Remove incorrect clock-frequency property

The system timer in the gem5 server dtb incorrectly overrode the
timer's clock frequency. This made the kernel believe that the timer
was ticking 4x faster than it actually did. This change set removes
the incorrect property, forcing the kernel to probe the timer for the
correct frequency.

Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Signed-off-by: Chris Emmons <chris.emmons@arm.com>
diff --git a/arch/arm64/boot/dts/aarch64_gem5_server.dts b/arch/arm64/boot/dts/aarch64_gem5_server.dts
index 5d97b72..e770601 100644
--- a/arch/arm64/boot/dts/aarch64_gem5_server.dts
+++ b/arch/arm64/boot/dts/aarch64_gem5_server.dts
@@ -88,7 +88,6 @@
          compatible = "arm,armv8-timer";
          interrupts = <1 13 0xff01>,
                     <1 14 0xff01>;
-         clock-frequency = <100000000>;
      };
 
     pci {