mrw-rev: make variable names generic

Change-Id: I23a0dcffbbd18e64d59122e9405618bef5841d56
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/meta-phosphor/common/recipes-phosphor/mrw/mrw-patch-native.bb b/meta-phosphor/common/recipes-phosphor/mrw/mrw-patch-native.bb
index b67b262..acaec73 100644
--- a/meta-phosphor/common/recipes-phosphor/mrw/mrw-patch-native.bb
+++ b/meta-phosphor/common/recipes-phosphor/mrw/mrw-patch-native.bb
@@ -10,8 +10,8 @@
 
 DEPENDS += "python-native python-lxml-native"
 
-SRC_URI += "${MRW_PATCH_SRC_URI}"
-SRCREV = "${MRW_PATCH_SRCREV}"
+SRC_URI += "${MRW_TOOLS_SRC_URI}"
+SRCREV = "${MRW_TOOLS_SRCREV}"
 
 do_install() {
     install -d ${D}${bindir}/obmc-mrw