serial: fix usart3 AF for g070, g071, g080

For usart3 the PC and PD banks use AF0 rather then AF1. Tested on STM32G071RBT6
and validate against the stm32-data definitions from embassy

Signed-off-by: Sjoerd Simons <[email protected]>

Author: sjoerdsimons

src/serial/usart.rs

@@ -775,17 +775,17 @@ uart_shared!(USART3, USART3_RX, USART3_TX,
         (PB2, AltFunction::AF4),
         (PB8, AltFunction::AF4),
         (PB10, AltFunction::AF4),
-        (PC4, AltFunction::AF1),
-        (PC10, AltFunction::AF1),
-        (PD8, AltFunction::AF1),
+        (PC4, AltFunction::AF0),
+        (PC10, AltFunction::AF0),
+        (PD8, AltFunction::AF0),
     ],
     rx: [
         (PB0, AltFunction::AF4),
         (PB9, AltFunction::AF4),
         (PB11, AltFunction::AF4),
-        (PC5, AltFunction::AF1),
-        (PC11, AltFunction::AF1),
-        (PD9, AltFunction::AF1),
+        (PC5, AltFunction::AF0),
+        (PC11, AltFunction::AF0),
+        (PD9, AltFunction::AF0),
     ],
     de: [
         (PA15, AltFunction::AF5),