treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

GPL-2.0-only

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

reset: hisilicon: add reset-hi3660

Add hi3660 reset driver
Example of dts usage:
iomcu_rst: iomcu_rst_controller {
compatible = "hisilicon,hi3660-reset";
hisi,rst-syscon = <&iomcu>;
#reset-cells = <2>;
};

i2c0: i2c@..... {
...
resets = <&iomcu_rst 0x20 3>; /* offset: 0x20; bit: 3 */
...
};

Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

reset: hi6220: Reset driver for hisilicon hi6220 SoC

Add reset driver for hi6220-hikey board,this driver supply deassert
of IP on hi6220 SoC.

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>