ipmi: split dbus get property into separate file

This is a step towards handling getting/setting dbus properties as an
implementation of an interface, de-coupling from dbus.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I81a2c5100833235811d4b7e59152d70585c7abaf
diff --git a/Makefile.am b/Makefile.am
index b2116c9..f62a5f3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -119,7 +119,8 @@
 libmanualcmds_LTLIBRARIES = libmanualcmds.la
 libmanualcmds_la_SOURCES = \
 	ipmi/main_ipmi.cpp \
-	ipmi/manualcmds.cpp
+	ipmi/manualcmds.cpp \
+	ipmi/dbus_mode.cpp
 libmanualcmds_la_LDFLAGS = \
 	$(SYSTEMD_LIBS) \
 	$(PHOSPHOR_DBUS_INTERFACES_LIBS) \