kunit: tool: Add support for SH under QEMU

Add basic support to run SH under QEMU via kunit_tool using the
virtualized r2d platform.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/kunit/qemu_configs/sh.py

+# SPDX-License-Identifier: GPL-2.0-only
+from ..qemu_config import QemuArchParams
+
+QEMU_ARCH = QemuArchParams(linux_arch='sh',
+			   kconfig='''
+CONFIG_CPU_SUBTYPE_SH7751R=y
+CONFIG_MEMORY_START=0x0c000000
+CONFIG_SH_RTS7751R2D=y
+CONFIG_RTS7751R2D_PLUS=y
+CONFIG_SERIAL_SH_SCI=y''',
+			   qemu_arch='sh4',
+			   kernel_path='arch/sh/boot/zImage',
+			   kernel_command_line='console=ttySC1',
+			   serial='null',
+			   extra_qemu_params=[
+					    '-machine', 'r2d',
+					    '-serial', 'mon:stdio'])