dt-bindings: pinctrl: mediatek,pinctrl-mt6795: Improve interrupts description

Clarify the meaning of sysirq to avoid confusion.

Suggested-by: AngeloGioacchino Del Regno <[e-mail]>
Signed-off-by: Yassine Oudjana <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

Documentation/devicetree/bindings/pinctrl/mediatek,pinctrl-mt6795.yaml

···
     const: 2
 
   interrupts:
-    description: The interrupt outputs to sysirq.
+    description: Interrupt outputs to the system interrupt controller (sysirq).
     minItems: 1
     items:
       - description: EINT interrupt