boards: stm32n6570_dk/nucleo_n657x0_q: Set NOR XSPI controller clk to HCLK5

Fix copy/paste issue on XSPI_SEL macro and use HCLK5 as kernel clk.
This has no functional impact on NOR as HCLK5 is the default clk which
was used due to the copy/paste error.
Remove now useless ic3 nodes.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

boards/st/nucleo_n657x0_q/nucleo_n657x0_q_common.dtsi

@@ -97,12 +97,6 @@
 	status = "okay";
 };
 
-&ic3 {
-	pll-src = <1>;
-	ic-div = <6>;
-	status = "okay";
-};
-
 &ic6 {
 	pll-src = <3>;
 	ic-div = <2>;
@@ -231,7 +225,7 @@ zephyr_udc0: &usbotg_hs1 {
 		     &xspim_p2_io6_pn10 &xspim_p2_io7_pn11>;
 	pinctrl-names = "default";
 	clocks = <&rcc STM32_CLOCK(AHB5, 12)>,
-		 <&rcc STM32_SRC_IC3 XSPI1_SEL(2)>,
+		 <&rcc STM32_SRC_HCLK5 XSPI2_SEL(0)>,
 		 <&rcc STM32_CLOCK(AHB5, 13)>;
 	status = "okay";
 

boards/st/stm32n6570_dk/stm32n6570_dk_common.dtsi

@@ -144,12 +144,6 @@
 	status = "okay";
 };
 
-&ic3 {
-	pll-src = <1>;
-	ic-div = <6>;
-	status = "okay";
-};
-
 &ic4 {
 	pll-src = <2>;
 	ic-div = <32>;
@@ -342,7 +336,7 @@ zephyr_udc0: &usbotg_hs1 {
 		     &xspim_p2_io6_pn10 &xspim_p2_io7_pn11>;
 	pinctrl-names = "default";
 	clocks = <&rcc STM32_CLOCK(AHB5, 12)>,
-		 <&rcc STM32_SRC_IC3 XSPI1_SEL(2)>,
+		 <&rcc STM32_SRC_HCLK5 XSPI2_SEL(0)>,
 		 <&rcc STM32_CLOCK(AHB5, 13)>;
 	status = "okay";