LF-6191 soc: imx: Update the copyright and license

Update the copyright and license info for this newly
added file.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>

drivers/soc/imx/imx8ulp_lpm.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2022 NXP
+ */
+
 #include <linux/arm-smccc.h>
 #include <linux/clk.h>
 #include <linux/device.h>