soc: arm: move z_clearfaults() in kernel_arch_init()

In kernel_arch_init() we initialize the ARM core (interrupt
setup, fault init, etc.) so we can also move z_clearfaults()
in the same function and skip invoking it in the SoC init
functions.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>

soc/arm/nxp_imx/rt/soc.c

@@ -235,8 +235,6 @@ static int imxrt_init(struct device *arg)
 		SCB_EnableDCache();
 	}
 
-	z_clearfaults();
-
 	/* Initialize system clock */
 	clkInit();