Move BUCK targets

Summary: As title

Differential Revision: D83053817

Author: JakeStevens

backends/nxp/runtime/targets.bzl

@@ -2,19 +2,21 @@ load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
 
 def define_common_targets():
     runtime.cxx_library(
-        name = "nxp_backend",
+        name = "nxp_backend_base",
         srcs = ["NeutronBackend.cpp"],
-        exported_headers = ["NeutronDriver.h", "NeutronErrors.h"],
-        compatible_with = ["ovr_config//cpu:arm32-embedded", "@fbsource//arvr/firmware/projects/smartglasses/config:embedded-mcu-rtos"],
-        # Neutron runtime needs to compile with executor as whole
-        # @lint-ignore BUCKLINT: Avoid `link_whole=True` (https://fburl.com/avoid-link-whole)
+        exported_headers = [
+            "NeutronDriver.h",
+            "NeutronErrors.h",
+        ],
         link_whole = True,
         # Constructor needed for backend registration.
         compiler_flags = ["-Wno-global-constructors", "-fno-rtti", "-DNO_HEAP_USAGE"],
-        visibility = ["@EXECUTORCH_CLIENTS"],
+        visibility = [
+            "//executorch/backends/nxp/runtime/fb:nxp_fb_backend",
+            "@EXECUTORCH_CLIENTS",
+        ],
         deps = [
             "//executorch/runtime/backend:interface",
             "//executorch/runtime/core:core",
-            "fbsource//arvr/third-party/toolchains/nxp-sdk/2.16.0/middleware/eiq/executorch/third-party/neutron/rt700:libNeutron",
         ],
     )