phosphor-power: use python3

The python scripts in this repo supports both python2 and python3.
Use python3 now since python2 is EOL.

Tested: Verify the recipe builds fine with sdbusplus python2 or python3.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: I75f7cb2003b617e8d85cb7534f503c37359f820b
diff --git a/recipes-phosphor/power/phosphor-power.inc b/recipes-phosphor/power/phosphor-power.inc
index 5328503..7cef5b3 100644
--- a/recipes-phosphor/power/phosphor-power.inc
+++ b/recipes-phosphor/power/phosphor-power.inc
@@ -2,4 +2,4 @@
 LICENSE = "Apache-2.0"
 LIC_FILES_CHKSUM = "file://${S}/LICENSE;md5=e3fc50a88d0a364313df4b21ef20c29e"
 SRC_URI += "git://github.com/openbmc/phosphor-power"
-SRCREV = "a57e08144d76456cfe14859bd6e5c096f9a9ad59"
+SRCREV = "43082e70b20692017c279c4448c8f05066ce3805"