Spell "unkown" correctly in error_report() arguments

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/hw/milkymist-sysctl.c b/hw/milkymist-sysctl.c
index 6bd0cb9..7b2d544 100644
--- a/hw/milkymist-sysctl.c
+++ b/hw/milkymist-sysctl.c
@@ -119,7 +119,7 @@
         break;
 
     default:
-        error_report("milkymist_sysctl: read access to unkown register 0x"
+        error_report("milkymist_sysctl: read access to unknown register 0x"
                 TARGET_FMT_plx, addr << 2);
         break;
     }
@@ -189,7 +189,7 @@
         break;
 
     default:
-        error_report("milkymist_sysctl: write access to unkown register 0x"
+        error_report("milkymist_sysctl: write access to unknown register 0x"
                 TARGET_FMT_plx, addr << 2);
         break;
     }