dt-bindings: clk: versaclock5: fix 'idt' prefix typos

'idt' is misspelled 'itd' in a few places, fix it.

Fixes: 34662f6e ("dt: Add additional option bindings for IDT VersaClock")
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200723074112.3159-2-luca@lucaceresoli.netSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/idt,versaclock5.txt

@@ -35,7 +35,7 @@ For all output ports, a corresponding, optional child node named OUT1,
 OUT2, etc. can represent a each output, and the node can be used to
 specify the following:
 
-- itd,mode: can be one of the following:
+- idt,mode: can be one of the following:
                  - VC5_LVPECL
                  - VC5_CMOS
                  - VC5_HCSL33
@@ -106,7 +106,7 @@ i2c-master-node {
 		clock-names = "xin";
 
 		OUT1 {
-			itd,mode = <VC5_CMOS>;
+			idt,mode = <VC5_CMOS>;
 			idt,voltage-microvolts = <1800000>;
 			idt,slew-percent = <80>;
 		};