flash: add openocd settings to atsamd21 / atsamd51

targets/atsamd21e18a.json

@@ -9,5 +9,7 @@
 	"linkerscript": "targets/atsamd21.ld",
 	"extra-files": [
 		"src/device/sam/atsamd21e18a.s"
-	]
+	],
+	"openocd-transport": "swd",
+	"openocd-target": "at91samdXX"
 }

targets/atsamd21g18a.json

@@ -9,5 +9,7 @@
 	"linkerscript": "targets/atsamd21.ld",
 	"extra-files": [
 		"src/device/sam/atsamd21g18a.s"
-	]
+	],
+	"openocd-transport": "swd",
+	"openocd-target": "at91samdXX"
 }

targets/atsamd51g19a.json

@@ -7,5 +7,7 @@
 	"linkerscript": "targets/atsamd51.ld",
 	"extra-files": [
 		"src/device/sam/atsamd51g19a.s"
-	]
+	],
+	"openocd-transport": "swd",
+	"openocd-target": "atsame5x"
 }

targets/atsamd51j19a.json

@@ -7,5 +7,7 @@
 	"linkerscript": "targets/atsamd51.ld",
 	"extra-files": [
 		"src/device/sam/atsamd51j19a.s"
-	]
+	],
+	"openocd-transport": "swd",
+	"openocd-target": "atsame5x"
 }

targets/atsamd51j20a.json

@@ -7,5 +7,7 @@
 	"linkerscript": "targets/atsamd51j20a.ld",
 	"extra-files": [
 		"src/device/sam/atsamd51j20a.s"
-	]
+	],
+	"openocd-transport": "swd",
+	"openocd-target": "atsame5x"
 }

targets/atsamd51p19a.json

@@ -7,5 +7,7 @@
 	"linkerscript": "targets/atsamd51.ld",
 	"extra-files": [
 		"src/device/sam/atsamd51p19a.s"
-	]
+	],
+	"openocd-transport": "swd",
+	"openocd-target": "atsame5x"
 }