regulators: Implements support for i2c_write_bytes

Implements support for parsing the i2c_write_bytes JSON elements in the
configuration file parser.

Signed-off-by: Bob King <Bob_King@wistron.com>
Change-Id: I6233361a6cc5a243b563e59e1aec70eec7a5b7f5
diff --git a/phosphor-regulators/test/meson.build b/phosphor-regulators/test/meson.build
index 5f68fba..d23bdf1 100644
--- a/phosphor-regulators/test/meson.build
+++ b/phosphor-regulators/test/meson.build
@@ -66,5 +66,5 @@
                     libi2c_dev_mock_inc
                 ]
      ),
-     timeout : 150
+     timeout : 180
 )