New recipe for setting Witherspoon fan speeds

For bringup use to set the fans to a fixed value until the real
fan control code is ready.  Can be removed then.

Change-Id: I9e07d371222e19b542fd0c211180f5c5f5747061
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/meta-witherspoon/recipes-phosphor/images/obmc-phosphor-image.bbappend b/meta-witherspoon/recipes-phosphor/images/obmc-phosphor-image.bbappend
new file mode 100644
index 0000000..fa330be
--- /dev/null
+++ b/meta-witherspoon/recipes-phosphor/images/obmc-phosphor-image.bbappend
@@ -0,0 +1 @@
+OBMC_IMAGE_EXTRA_INSTALL_append = " fan-default-speed"