enable the final slot

The debug uart is shared with slot 7, so in order to use sim slot 7 the
pin config and the uart config needs to be changed. Going back to using
the debug uart works by defining ENABLE_DBG_UART7

Change-Id: I8f3c7c60306941159c35307a5c1e38c2a2bd2fe1
diff --git a/sysmoOCTSIM/command.c b/sysmoOCTSIM/command.c
index 454cd2f..48d8c11 100644
--- a/sysmoOCTSIM/command.c
+++ b/sysmoOCTSIM/command.c
@@ -78,6 +78,7 @@
 
 void command_try_recv(void)
 {
+#ifdef ENABLE_DBG_UART7
 	unsigned int i = 0;
 
 	/* yield CPU after maximum of 10 received characters */
@@ -101,6 +102,7 @@
 
 		i++;
 	}
+#endif
 }
 
 void command_init(const char *prompt)