drivers: rstctrl: add reset controller for STM32MP21 platforms

Implement the STM32MP21 reset controller device by embedding it
with CFG_STM32_RSTCTRL=y and CFG_STM32MP21_RSTCTRL=y.

Signed-off-by: N

drivers: rstctrl: add reset controller for STM32MP21 platforms

Implement the STM32MP21 reset controller device by embedding it
with CFG_STM32_RSTCTRL=y and CFG_STM32MP21_RSTCTRL=y.

Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Acked-by: Gatien Chevallier <gatien.chevallier@foss.st.com>

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