Tweak platformio debug_server options

platformio.ini

 debug_tool     = custom
 debug_server   =
   C:\Program Files (x86)\SEGGER\JLink_V618d\JLinkGDBServerCL.exe
-  -select
-  USB
-  -port
-  2331
-  -device
-  LPC1768
-  -if
-  JTAG
-  -speed
-  auto
+  -select USB
+  -port 2331
+  -device LPC1768
+  -if JTAG
+  -speed auto
   -noir
 
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