inputd: fix service type to scheme='input' for init registration

The v6.0 service file used type={scheme='input/evdev'} which caused
init to register the scheme under the wrong name. Restored the
original type={scheme='input'} so init correctly registers the
:input scheme and all downstream services (vesad, fbcond, fbbootlogd)
can find it.

recipes/core/base/init.initfs.d/10_inputd.service

@@ -1,6 +1,6 @@
 [unit]
-description = "v6.0 input/evdev ring buffer (multi-writer, single-reader)"
+description = "VT input and graphics multiplexer"
 
 [service]
 cmd = "inputd"
-type = { scheme = "input/evdev" }
+type = { scheme = "input" }