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_kinetis/ke1xf/soc.c

@@ -232,8 +232,6 @@ static int ke1xf_init(struct device *arg)
 	SYSMPU->CESR = temp_reg;
 #endif /* !CONFIG_ARM_MPU */
 
-	z_clearfaults();
-
 	/* Initialize system clocks and PLL */
 	clk_init();