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>

sh: intc: initial irqdomain support.

Trivial support for irq domains, using either a linear map or radix tree
depending on the vector layout.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

sh: intc: Kill off deprecated dynamic IRQ API.

Now that all of the users have been converted away, kill off the remnants
of the old API.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

sh: intc: Add missing files.

The Kconfig and Makefile were overlooked, add those in now to improve
odds of building.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>