regulators: Create regulators CompareVPDAction class

Create the CompareVPDAction class that implements the
"compare_vpd" action in the JSON config file.

Only create the .hpp file for CompareVPDAction class first.

Signed-off-by: Bob King <Bob_King@wistron.com>
Change-Id: I49663e1f9a2a28996b397cca47eb2c47847592bf
diff --git a/phosphor-regulators/test/meson.build b/phosphor-regulators/test/meson.build
index d37ef23..a9ac996 100644
--- a/phosphor-regulators/test/meson.build
+++ b/phosphor-regulators/test/meson.build
@@ -26,6 +26,7 @@
     'actions/action_utils_tests.cpp',
     'actions/and_action_tests.cpp',
     'actions/compare_presence_action_tests.cpp',
+    'actions/compare_vpd_action_tests.cpp',
     'actions/i2c_action_tests.cpp',
     'actions/i2c_compare_bit_action_tests.cpp',
     'actions/i2c_compare_byte_action_tests.cpp',