nrf: add support for SoftDevices to PCA10040 board

targets/nrf52-s132v6.json

@@ -0,0 +1,4 @@
+{
+	"build-tags": ["softdevice"],
+	"linkerscript": "targets/nrf52-s132v6.ld"
+}

targets/nrf52-s132v6.ld

@@ -0,0 +1,10 @@
+
+MEMORY
+{
+    FLASH_TEXT (rw) : ORIGIN = 0x00000000 + 0x00026000 , LENGTH = 256K - 0x00026000 /* .text */
+    RAM (xrw)       : ORIGIN = 0x20000000 + 0x000039c0,  LENGTH = 64K  - 0x000039c0
+}
+
+_stack_size = 4K;
+
+INCLUDE "targets/arm.ld"

targets/nrf52.json

@@ -7,7 +7,8 @@
 		"-mfloat-abi=soft",
 		"-Qunused-arguments",
 		"-DNRF52832_XXAA",
-		"-I{root}/lib/CMSIS/CMSIS/Include"
+		"-I{root}/lib/CMSIS/CMSIS/Include",
+		"-I{root}/lib/nrfx/mdk"
 	],
 	"linkerscript": "targets/nrf52.ld",
 	"extra-files": [

targets/pca10040-s132v6.json

@@ -0,0 +1,4 @@
+{
+	"inherits": ["pca10040", "nrf52-s132v6"],
+	"ldscript": "targets/nrf52-s132v6.ld"
+}