inspur: fp5280g2: Add fp5280g2 psu fw update function

Add phosphor-psu-software-manager and use inspur specific binary tool
to update fp5280g2's psu firmware.

Signed-off-by: Chicago Duan <duanzhijia01@inspur.com>
Change-Id: Ic54080db5e677d6f91cc28cee0767206fd677219
diff --git a/meta-fp5280g2/recipes-phosphor/power/phosphor-psu-software-manager_%.bbappend b/meta-fp5280g2/recipes-phosphor/power/phosphor-psu-software-manager_%.bbappend
new file mode 100644
index 0000000..6d4804d
--- /dev/null
+++ b/meta-fp5280g2/recipes-phosphor/power/phosphor-psu-software-manager_%.bbappend
@@ -0,0 +1,2 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+