Attn: Change mpipl target to crash@0 target

To start MPIPL we need to start obmc-host-crash@0.target (changed from
obmc-host-diagnostic-mode@0.target).

Signed-off-by: Ben Tyner <ben.tyner@ibm.com>
Change-Id: I41294357a3f08ea41b320a3b892045f6f0c81f78
diff --git a/attn/attn_common.hpp b/attn/attn_common.hpp
index 559a9f3..7d8ed34 100644
--- a/attn/attn_common.hpp
+++ b/attn/attn_common.hpp
@@ -6,7 +6,8 @@
 enum class HostState
 {
     Quiesce,
-    Diagnostic
+    Diagnostic,
+    Crash
 };
 
 /**