regulators: Add PMBusReadSensorAction::execute()

Implementation and Testing for PMBusReadSensorAction::execute().

Signed-off-by: Bob King <Bob_King@wistron.com>
Change-Id: I350eccfd6daaf957865329756cdfb3be48f49377
diff --git a/phosphor-regulators/src/meson.build b/phosphor-regulators/src/meson.build
index 1a1602f..4adeb58 100644
--- a/phosphor-regulators/src/meson.build
+++ b/phosphor-regulators/src/meson.build
@@ -22,6 +22,7 @@
     'actions/i2c_write_bit_action.cpp',
     'actions/i2c_write_byte_action.cpp',
     'actions/i2c_write_bytes_action.cpp',
+    'actions/pmbus_read_sensor_action.cpp',
     'actions/pmbus_write_vout_command_action.cpp'
 ]