meson: simplify dependencies

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

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5bbde5732df9604b6ea45eaae519bdf64c27ee3c
diff --git a/meson.build b/meson.build
index a108757..63e9f04 100644
--- a/meson.build
+++ b/meson.build
@@ -44,19 +44,14 @@
        'environemt to point at boost build. To build a boost you can use ' +
        'script ./scripts/boost_build_1.74.0.sh')
 
-phosphor_logging = dependency(
-    'phosphor-logging',
-    fallback: ['phosphor-logging', 'phosphor_logging_dep'],
-)
-
-sdbusplus = dependency('sdbusplus', fallback: ['sdbusplus', 'sdbusplus_dep'])
+phosphor_logging = dependency('phosphor-logging')
+sdbusplus = dependency('sdbusplus')
 systemd = dependency('systemd')
 
 if cpp.has_header('nlohmann/json.hpp')
     nlohmann_json = declare_dependency()
 else
-    nlohmann_json = dependency('nlohmann_json',
-                               fallback: ['nlohmann', 'nlohmann_json_dep'])
+    nlohmann_json = dependency('nlohmann_json')
 endif
 
 add_project_arguments(