fixup! Utilize LDREX/STREX in GPIO configure functions

Author: Sh3Rm4n

src/gpio.rs

@@ -814,30 +814,30 @@ macro_rules! impl_gpio_reg_ext {
 
                 impl_gpio_trait_for_register! {
                     ($gpioy::moder::MODER15_A, 2);
-                    fn input { INPUT }
-                    fn output { OUTPUT }
-                    fn alternate { ALTERNATE }
-                    fn analog { ANALOG }
+                    fn input { Input }
+                    fn output { Output }
+                    fn alternate { Alternate }
+                    fn analog { Analog }
                 }
 
                 impl_gpio_trait_for_register! {
                     ($gpioy::otyper::OT15_A, 1);
-                    fn push_pull { PUSHPULL }
-                    fn open_drain { OPENDRAIN }
+                    fn push_pull { PushPull }
+                    fn open_drain { OpenDrain }
                 }
 
                 impl_gpio_trait_for_register! {
                     ($gpioy::ospeedr::OSPEEDR15_A, 2);
-                    fn low_speed { LOWSPEED }
-                    fn medium_speed { MEDIUMSPEED }
-                    fn high_speed { HIGHSPEED }
+                    fn low_speed { LowSpeed }
+                    fn medium_speed { MediumSpeed }
+                    fn high_speed { HighSpeed }
                 }
 
                 impl_gpio_trait_for_register! {
                     ($gpioy::pupdr::PUPDR15_A, 2);
-                    fn floating { FLOATING }
-                    fn pull_up { PULLUP }
-                    fn pull_down { PULLDOWN }
+                    fn floating { Floating }
+                    fn pull_up { PullUp }
+                    fn pull_down { PullDown }
                 }
 
                 #[inline]