hw/bsp/b-l475e-iot01a: Use common startup code

This:
- removes .cmd files that are no longer needed.
- removes local linker scripts
- removes download script and allows to use global one
- removes startup_stm32l475xx.s
- switches to use common startup and linke scripts

Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>

hw/bsp/b-l475e-iot01a/bsp.yml

@@ -22,16 +22,9 @@ bsp.url: https://www.st.com/en/evaluation-tools/b-l475e-iot01a.html
 bsp.maker: "STMicroelectronics"
 bsp.arch: cortex_m4
 bsp.compiler: compiler/arm-none-eabi-m4
-bsp.linkerscript:
-    - "hw/bsp/b-l475e-iot01a/b-l475e-iot01a.ld"
-    - "@apache-mynewt-core/hw/mcu/stm/stm32l4xx/stm32l476.ld"
-bsp.linkerscript.BOOT_LOADER.OVERWRITE:
-    - "hw/bsp/b-l475e-iot01a/boot-b-l475e-iot01a.ld"
-    - "@apache-mynewt-core/hw/mcu/stm/stm32l4xx/stm32l476.ld"
-bsp.downloadscript: "hw/bsp/b-l475e-iot01a/b-l475e-iot01a_download.sh"
+bsp.linkerscript: autogenerated
+bsp.downloadscript: "hw/scripts/download.sh"
 bsp.debugscript: "hw/bsp/b-l475e-iot01a/b-l475e-iot01a_debug.sh"
-bsp.downloadscript.WINDOWS.OVERWRITE: "hw/bsp/b-l475e-iot01a/b-l475e-iot01a_download.cmd"
-bsp.debugscript.WINDOWS.OVERWRITE: "hw/bsp/b-l475e-iot01a/b-l475e-iot01a_debug.cmd"
 
 bsp.flash_map:
     areas:

hw/bsp/b-l475e-iot01a/pkg.yml

@@ -36,6 +36,8 @@ pkg.cflags.HARDFLOAT:
 pkg.deps:
     - "@apache-mynewt-core/hw/mcu/stm/stm32l4xx"
     - "@apache-mynewt-core/libc"
+    - "@apache-mynewt-core/hw/scripts"
+    - "@apache-mynewt-core/boot/startup"
 
 pkg.deps.LPS22HB_ONB:
     - "@apache-mynewt-core/hw/drivers/sensors/lps33hw"