sam9x75_curiosity: Align the overlay with board DT

Align the overlay properties with board DT and drivers.

Fixes: 9e606bd ("sam9x75_curiosity: Add overlay for AC69T88A LVDS Display Panel")
Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
Acked-by : Cristian Birsan <cristian.birsan@microchip.com>

Author: Dharma-B

sam9x75_curiosity/sam9x75_curiosity_lvds_display.dtso

@@ -36,7 +36,7 @@
 	};
 
 	panel {
-		compatible = "sitronix,7262-lvds", "simple-panel";
+		compatible = "sitronix,st7262", "simple-panel";
 		backlight = <&lvds_panel_bl>;
 		power-supply = <&mic23150_reg>;
 		status="okay";
@@ -73,9 +73,6 @@
 &hlcdc {
 	clocks = <&pmc PMC_TYPE_PERIPHERAL 25>, <&pmc PMC_TYPE_CORE PMC_LVDSPLL>, <&clk32k 1>;
 	clock-names = "periph_clk", "lvds_pll_clk", "slow_clk";
-	microchip,use-lvds-pll; /* Use LVDS PLL instead of sys clk */
-	assigned-clocks = <&pmc PMC_TYPE_CORE PMC_LVDSPLL>;
-	assigned-clock-rates = <175000000>;
 	status="okay";
 
 	hlcdc-display-controller {