fixup! fixup! Utilize LDREX/STREX in GPIO configure functions

Author: Sh3Rm4n

CHANGELOG.md

@@ -631,6 +631,7 @@ let clocks = rcc
 [#220]: https://github.com/stm32-rs/stm32f3xx-hal/pull/220
 [#217]: https://github.com/stm32-rs/stm32f3xx-hal/pull/217
 [#216]: https://github.com/stm32-rs/stm32f3xx-hal/pull/216
+[#213]: https://github.com/stm32-rs/stm32f3xx-hal/pull/213
 [#212]: https://github.com/stm32-rs/stm32f3xx-hal/pull/212
 [#210]: https://github.com/stm32-rs/stm32f3xx-hal/pull/210
 [#208]: https://github.com/stm32-rs/stm32f3xx-hal/pull/208