hw/arm/virt: Add "max" to the list of CPU types "virt" supports

Allow the virt board to support '-cpu max' in the same way
it already handles '-cpu host'.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Message-id: 20180308130626.12393-6-peter.maydell@linaro.org
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>

hw/arm/virt.c

@@ -169,6 +169,7 @@ static const char *valid_cpus[] = {
     ARM_CPU_TYPE_NAME("cortex-a53"),
     ARM_CPU_TYPE_NAME("cortex-a57"),
     ARM_CPU_TYPE_NAME("host"),
+    ARM_CPU_TYPE_NAME("max"),
 };
 
 static bool cpu_type_valid(const char *cpu)