dt-bindings: mfd: fix stm32 timers example

The stm32 timers example name should match the pattern timer@. Also,
the example is based on stm32mp1 timer 2, so the identifier should be
'1' instead of '0' (e.g. timer 1).

Fixes: bfbcbf88f9db ("dt-bindings: timer: Convert stm32 timer bindings to json-schema")

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/1606913114-25693-1-git-send-email-fabrice.gasnier@foss.st.com
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/mfd/st,stm32-timers.yaml

@@ -131,7 +131,7 @@ additionalProperties: false
 examples:
   - |
     #include <dt-bindings/clock/stm32mp1-clks.h>
-    timers2: timers@40000000 {
+    timers2: timer@40000000 {
       #address-cells = <1>;
       #size-cells = <0>;
       compatible = "st,stm32-timers";
@@ -149,9 +149,9 @@ examples:
         #pwm-cells = <3>;
         st,breakinput = <0 1 5>;
       };
-      timer@0 {
+      timer@1 {
         compatible = "st,stm32-timer-trigger";
-        reg = <0>;
+        reg = <1>;
       };
       counter {
         compatible = "st,stm32-timer-counter";