drivers: wifi: simplelink: move files into a dedicated subdir

Place simplelink driver files into a subdirectory on par with
winc1500 subdirectory, to effect a better file organization.

No functional change in this patch.

Signed-off-by: Gil Pitney <gil.pitney@linaro.org>

drivers/wifi/CMakeLists.txt

@@ -1,14 +1,2 @@
 add_subdirectory_ifdef(CONFIG_WIFI_WINC1500	winc1500)
-if(CONFIG_WIFI_SIMPLELINK)
-  zephyr_include_directories(
-    .
-    $ENV{ZEPHYR_BASE}/ext/hal/ti/simplelink/kernel/zephyr/dpl
-    $ENV{ZEPHYR_BASE}/ext/hal/ti/simplelink/source
-    $ENV{ZEPHYR_BASE}/ext/hal/ti/simplelink/source/ti/drivers/net/wifi/porting
-    $ENV{ZEPHYR_BASE}/ext/hal/ti/simplelink/source/ti/drivers/net/wifi/bsd
-    )
-  zephyr_sources(
-    simplelink_support.c
-    simplelink.c
-    )
-endif()
+add_subdirectory_ifdef(CONFIG_WIFI_SIMPLELINK	simplelink)

drivers/wifi/Kconfig

@@ -42,6 +42,6 @@ config WIFI_OFFLOAD
 	  Enable support for Full-MAC WiFi devices.
 
 source "drivers/wifi/winc1500/Kconfig.winc1500"
-source "drivers/wifi/Kconfig.simplelink"
+source "drivers/wifi/simplelink/Kconfig.simplelink"
 
 endif # WIFI

drivers/wifi/simplelink/CMakeLists.txt

@@ -0,0 +1,13 @@
+if(CONFIG_WIFI_SIMPLELINK)
+  zephyr_include_directories(
+    .
+    $ENV{ZEPHYR_BASE}/ext/hal/ti/simplelink/kernel/zephyr/dpl
+    $ENV{ZEPHYR_BASE}/ext/hal/ti/simplelink/source
+    $ENV{ZEPHYR_BASE}/ext/hal/ti/simplelink/source/ti/drivers/net/wifi/porting
+    $ENV{ZEPHYR_BASE}/ext/hal/ti/simplelink/source/ti/drivers/net/wifi/bsd
+    )
+  zephyr_sources(
+    simplelink_support.c
+    simplelink.c
+    )
+endif()