psu: Update to use Power Supply Manager class

Create a power supply manager class that will be used create a list of
power supplies to manage.

Change-Id: I4c392f7060fbd06dbe6a9417810ed911b3ea689a
Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
diff --git a/phosphor-power-supply/meson.build b/phosphor-power-supply/meson.build
index 1bb79de..c1fcb1f 100644
--- a/phosphor-power-supply/meson.build
+++ b/phosphor-power-supply/meson.build
@@ -4,5 +4,6 @@
     'main.cpp',
     dependencies: [
         sdbusplus,
+        sdeventplus,
     ],
     install: true)