nrf: support for SoftDevice s140 PCA10056 board

Makefile

@@ -233,6 +233,8 @@ smoketest:
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=x9pro               examples/blinky1
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=pca10056-s140v7     examples/blinky1
+	@$(MD5SUM) test.hex
 ifneq ($(AVR), 0)
 	$(TINYGO) build -size short -o test.hex -target=arduino             examples/blinky1
 	@$(MD5SUM) test.hex

targets/nrf52840-s140v7.json

@@ -0,0 +1,4 @@
+{
+	"build-tags": ["softdevice", "s140v7"],
+	"linkerscript": "targets/nrf52840-s140v7.ld"
+}

targets/nrf52840-s140v7.ld

@@ -0,0 +1,10 @@
+
+MEMORY
+{
+    FLASH_TEXT (rw) : ORIGIN = 0x00000000 + 0x00027000, LENGTH = 1M - 0x00027000
+    RAM (xrw)       : ORIGIN = 0x20000000 + 0x000039c0, LENGTH = 256K - 0x000039c0
+}
+
+_stack_size = 4K;
+
+INCLUDE "targets/arm.ld"

targets/pca10056-s140v7.json

@@ -0,0 +1,3 @@
+{
+	"inherits": ["pca10056", "nrf52840-s140v7"]
+}