regulators: Implement i2c_compare_byte action

Implement the i2c_compare_byte action in the JSON config file.  See
i2c_compare_byte.md for more information about this action.

Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
Change-Id: I258027f969684022f6fd5d85ab4dc32b4746a69c
diff --git a/phosphor-regulators/src/meson.build b/phosphor-regulators/src/meson.build
index 121bf45..a70a86a 100644
--- a/phosphor-regulators/src/meson.build
+++ b/phosphor-regulators/src/meson.build
@@ -6,7 +6,8 @@
 phosphor_regulators_library_source_files = [
     'id_map.cpp',
 
-    'actions/if_action.cpp'
+    'actions/if_action.cpp',
+    'actions/i2c_compare_byte_action.cpp'
 ]
 
 phosphor_regulators_library = static_library(