meson: simplify dependencies

Leverage wrapfile `[provide]` directives to simplify the dependency
searching in the meson.build.

Change-Id: I3ffeb36c566eed00a6070b6c823d9a7b2a8bfbc2
diff --git a/meson.build b/meson.build
index 4112b07..499f363 100644
--- a/meson.build
+++ b/meson.build
@@ -27,9 +27,9 @@
 
 deps = [dependency('boost'),
         dependency('boost', modules : ['coroutine']),
-        dependency('phosphor-dbus-interfaces', fallback: ['phosphor-dbus-interfaces', 'phosphor_dbus_interfaces_dep']),
-        dependency('phosphor-logging', fallback: ['phosphor-logging', 'phosphor_logging_dep']),
-        dependency('sdbusplus', fallback: ['sdbusplus', 'sdbusplus_dep']),
+        dependency('phosphor-dbus-interfaces'),
+        dependency('phosphor-logging'),
+        dependency('sdbusplus'),
         dependency('systemd'),
 ]