dt-bindings: interrupt-controller: Fix typos in loongson,liointc.yaml

Fix the following typos in loongson,liointc.yaml:
children -> child
fron -> from
connected -> connect
it's -> its

Fixes: b6280c8bb6 ("dt-bindings: interrupt-controller: Add Loongson LIOINTC")
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Link: https://lore.kernel.org/r/1594869390-21053-9-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml

@@ -51,8 +51,8 @@ properties:
     description: |
       This property points how the children interrupts will be mapped into CPU
       interrupt lines. Each cell refers to a parent interrupt line from 0 to 3
-      and each bit in the cell refers to a children interrupt fron 0 to 31.
-      If a CPU interrupt line didn't connected with liointc, then keep it's
+      and each bit in the cell refers to a child interrupt from 0 to 31.
+      If a CPU interrupt line didn't connect with liointc, then keep its
       cell with zero.
     $ref: /schemas/types.yaml#/definitions/uint32-array
     minItems: 4