dt-bindings: arm: stm32: Add missing STM32 boards

This commit documents missing STM32 boards:

-STM32MCU: F429 disco/eval, F469-disco, F746 disco/eval, F769 disco,
H743 disco/eval.

-STM32MPU: MP157 dk1/dk2/ed1/ev1.
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/stm32/stm32.yaml

@@ -13,19 +13,38 @@ properties:
   compatible:
     oneOf:
       - items:
+          - enum:
+              - st,stm32f429i-disco
+              - st,stm32429i-eval
           - const: st,stm32f429
-
       - items:
+          - enum:
+              - st,stm32f469i-disco
           - const: st,stm32f469
-
       - items:
+          - enum:
+              - st,stm32f746-disco
+              - st,stm32746g-eval
           - const: st,stm32f746
-
       - items:
+          - enum:
+              - st,stm32f769-disco
+          - const: st,stm32f769
+      - items:
+          - enum:
+              - st,stm32h743i-disco
+              - st,stm32h743i-eval
           - const: st,stm32h743
-
       - items:
           - enum:
               - arrow,stm32mp157a-avenger96 # Avenger96
+              - st,stm32mp157c-ed1
+              - st,stm32mp157a-dk1
+              - st,stm32mp157c-dk2
+
+          - const: st,stm32mp157
+      - items:
+          - const: st,stm32mp157c-ev1
+          - const: st,stm32mp157c-ed1
           - const: st,stm32mp157
 ...