hw/riscv/virt.c: fix typo in 'aia' description

Cc: qemu-trivial@nongnu.org
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/riscv/virt.c

@@ -1692,7 +1692,7 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
                                   virt_set_aia);
     object_class_property_set_description(oc, "aia",
                                           "Set type of AIA interrupt "
-                                          "conttoller. Valid values are "
+                                          "controller. Valid values are "
                                           "none, aplic, and aplic-imsic.");
 
     object_class_property_add_str(oc, "aia-guests",