dt-bindings: leds: common: Add mmc0 as default trigger

MMC could be a default trigger so add a pattern to match it and fix dtbs_check warnings like:

arch/arm/boot/dts/exynos4412-odroidx.dt.yaml: leds: led2:linux,default-trigger:0:
'mmc0' is not one of ['backlight', 'default-on', 'heartbeat', 'disk-activity', 'ide-disk', 'timer', 'pattern'] From schema: Documentation/devicetree/bindings/leds/leds-gpio.yaml

Signed-off-by Krzysztof Kozlowski <[email protected]>

---
 .../devicetree/bindings/leds/common.yaml      | 39 ++++++++++---------
 1 file changed, 20 insertions(+), 19 deletions(-)

Documentation/devicetree/bindings/leds/common.yaml +20 -19

index a2a541bca73c..6b38f9f3792c 100644
@@ -78,25 +78,26 @@ properties:
       This parameter, if present, is a string defining the trigger assigned to
       the LED.
     $ref: /schemas/types.yaml#definitions/string
-
-    enum:
-        # LED will act as a back-light, controlled by the framebuffer system
-      - backlight
-        # LED will turn on (but for leds-gpio see "default-state" property in
-        # Documentation/devicetree/bindings/leds/leds-gpio.yaml)
-      - default-on
-        # LED "double" flashes at a load average based rate
-      - heartbeat
-        # LED indicates disk activity
-      - disk-activity
-        # LED indicates IDE disk activity (deprecated), in new implementations
-        # use "disk-activity"
-      - ide-disk
-        # LED flashes at a fixed, configurable rate
-      - timer
-        # LED alters the brightness for the specified duration with one software
-        # timer (requires "led-pattern" property)
-      - pattern
+    oneOf:
+      - enum:
+            # LED will act as a back-light, controlled by the framebuffer system
+          - backlight
+            # LED will turn on (but for leds-gpio see "default-state" property in
+            # Documentation/devicetree/bindings/leds/leds-gpio.yaml)
+          - default-on
+            # LED "double" flashes at a load average based rate
+          - heartbeat
+            # LED indicates disk activity
+          - disk-activity
+            # LED indicates IDE disk activity (deprecated), in new implementations
+            # use "disk-activity"
+          - ide-disk
+            # LED flashes at a fixed, configurable rate
+          - timer
+            # LED alters the brightness for the specified duration with one software
+            # timer (requires "led-pattern" property)
+          - pattern
+      - pattern: "^mmc[0-9]+$"
 
   led-pattern:
     description: |

Signature · 1 line

2.17.1