clk: h8300: Remove "sh73a0-" part from compatible value

Drop the bogus "sh73a0-" part (accidentally copied from shmobile?) from
the compatible value.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Documentation/devicetree/bindings/clock/renesas,h8300-div-clock.txt

@@ -2,7 +2,7 @@
 
 Required Properties:
 
-  - compatible: Must be "renesas,sh73a0-h8300-div-clock"
+  - compatible: Must be "renesas,h8300-div-clock"
 
   - clocks: Reference to the parent clocks ("extal1" and "extal2")