dt_driver_test: add tests for gpio controller framework

Add various tests for the GPIO dt controller framework much like what was
done for the rstclr system.

Signed-off-by: Clément Léger <clement.l

dt_driver_test: add tests for gpio controller framework

Add various tests for the GPIO dt controller framework much like what was
done for the rstclr system.

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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core: dt_driver: drivers to test probe deferral

Implements driver providers for some emulated resource (clocks and reset
controllers), consumer drivers and a embedded test DTSI file to
test the DT_D

core: dt_driver: drivers to test probe deferral

Implements driver providers for some emulated resource (clocks and reset
controllers), consumer drivers and a embedded test DTSI file to
test the DT_DRIVER probe sequence.

The driver consumer run few tests and logs results locally. The
result participates in core self test result reported by the
PTA test interface.

One can test with vexpress platform flavor qemu_virt and qemu_v8 using,
for example, the build instruction below:
make PLATFORM=vexpress-qemu_virt \
CFG_DT_DRIVER_EMBEDDED_TEST=y \
CFG_EMBED_DTB_SOURCE_FILE=embedded_dtb_test.dts

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>

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