stm32/boards/PYBD_SF2: Put nimble library in external QSPI XIP flash.
The BLE stack is not performance critical, so put it in external
memory-mapped flash to save internal flash for other things (like frozen
bytecode).
@@ -49,6 +49,7 @@ SECTIONS
{
. = ALIGN(4);
*lib/mbedtls/*(.text* .rodata*)
+ *lib/mynewt-nimble/*(.text* .rodata*)
. = ALIGN(512);
*(.big_const*)
. = ALIGN(4);
