drivers: serial: mcux: enforce an error-free header inclusion

We need to change the order of inclusions in
uart_mcux_lpuart.c, to avoid build errors. This
is required since the driver structures contain
a field named DATA, which is also a macro defined
in the linker script.

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

drivers/serial/uart_mcux_lpuart.c

@@ -5,11 +5,11 @@
  */
 
 #include <errno.h>
+#include <soc.h>
+#include <fsl_lpuart.h>
 #include <device.h>
 #include <drivers/uart.h>
 #include <drivers/clock_control.h>
-#include <soc.h>
-#include <fsl_lpuart.h>
 
 struct mcux_lpuart_config {
 	LPUART_Type *base;