stm32/pin: In pin AF object, remove union of periph ptr types.

The individual union members (like SPI, I2C) are never used, only the
generic "reg" entry is.  And the union names can clash with macro
definitions in the HAL so better to remove them.

1 files changed, 1 insertions, 6 deletions

diff --git a/ports/stm32/pin.h b/ports/stm32/pin.h
index b0e05256f..ea57b0a27 100644
--- a/ports/stm32/pin.h
+++ b/ports/stm32/pin.h
@@ -39,12 +39,7 @@ typedef struct {
   uint8_t fn;
   uint8_t unit;
   uint8_t type;
-
-  union {
-    void          *reg;
-
-    PIN_DEFS_PORT_AF_UNION
-  };
+  void *reg; // The peripheral associated with this AF
 } pin_af_obj_t;
 
 typedef struct {