correct boot stage2 for itsybitsy and qt rp2040

hw/bsp/rp2040/boards/adafruit_itsybitsy_rp2040/board.cmake

@@ -1 +1 @@
-set(PICO_DEFAULT_BOOT_STAGE2_FILE "${PICO_SDK_PATH}/src/rp2_common/boot_stage2/boot2_generic_03h.S")
+set(PICO_DEFAULT_BOOT_STAGE2_FILE "${PICO_SDK_PATH}/src/rp2_common/boot_stage2/boot2_w25q080.S")

hw/bsp/rp2040/boards/adafruit_qt_rp2040/board.cmake

@@ -1 +1 @@
-set(PICO_DEFAULT_BOOT_STAGE2_FILE "${PICO_SDK_PATH}/src/rp2_common/boot_stage2/boot2_generic_03h.S")
+set(PICO_DEFAULT_BOOT_STAGE2_FILE "${PICO_SDK_PATH}/src/rp2_common/boot_stage2/boot2_w25q080.S")