dt-bindings: mfd: mt6370: Fix the indentation in the example

Fix the indentation in the binding example. There're two redudant space
charactors need to be removed.

Fixes: 76f52f815f1a ("dt-bindings: mfd: Add MediaTek MT6370")
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/1663295929-9024-1-git-send-email-u0084500@gmail.com