PSUSensor: add tps25990 support

Add device tps25990 reading support.

Change-Id: Ib7bd6302e462df343965e91a1512175d9abd0eb2
Signed-off-by: Kevin Tung <kevin.wtmh@gmail.com>
diff --git a/src/psu/PSUSensorMain.cpp b/src/psu/PSUSensorMain.cpp
index 51d9d78..8d5163c 100644
--- a/src/psu/PSUSensorMain.cpp
+++ b/src/psu/PSUSensorMain.cpp
@@ -135,6 +135,7 @@
     {"smpro_hwmon", I2CDeviceType{"smpro", false}},
     {"SY24655", I2CDeviceType{"sy24655", true}},
     {"TDA38640", I2CDeviceType{"tda38640", true}},
+    {"TPS25990", I2CDeviceType{"tps25990", true}},
     {"TPS53679", I2CDeviceType{"tps53679", true}},
     {"TPS546D24", I2CDeviceType{"tps546d24", true}},
     {"XDP710", I2CDeviceType{"xdp710", true}},