dt-bindings: mfd: mediatek: mt6397: Change to relative paths

Paths in dt-bindings should be relative as suggested by Lee Jones.
Suggested-By: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

Documentation/devicetree/bindings/mfd/mt6397.txt

@@ -12,7 +12,7 @@ MT6397/MT6323 is a multifunction device with the following sub modules:
 It is interfaced to host controller using SPI interface by a proprietary hardware
 called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.
 See the following for pwarp node definitions:
-Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
+../soc/mediatek/pwrap.txt
 
 This document describes the binding for MFD device and its sub module.
 
@@ -27,9 +27,9 @@ Optional subnodes:
 - regulators
 	Required properties:
 		- compatible: "mediatek,mt6397-regulator"
-	see Documentation/devicetree/bindings/regulator/mt6397-regulator.txt
+	see ../regulator/mt6397-regulator.txt
 		- compatible: "mediatek,mt6323-regulator"
-	see Documentation/devicetree/bindings/regulator/mt6323-regulator.txt
+	see ../regulator/mt6323-regulator.txt
 - codec
 	Required properties:
 		- compatible: "mediatek,mt6397-codec"
@@ -39,12 +39,12 @@ Optional subnodes:
 - led
 	Required properties:
 		- compatible: "mediatek,mt6323-led"
-	see Documentation/devicetree/bindings/leds/leds-mt6323.txt
+	see ../leds/leds-mt6323.txt
 
 - keys
 	Required properties:
 		- compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
-	see Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
+	see ../input/mtk-pmic-keys.txt
 
 Example:
 	pwrap: pwrap@1000f000 {