rng: stm32: rename STM32 RNG driver

Rename the RNG driver as it is usable by other STM32 platforms
than the STM32MP1x ones. Rename CONFIG_RNG_STM32MP1 to
CONFIG_RNG_STM32

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Grzegorz Szymaszek <gszymaszek@short.pl>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/drivers/rng/Kconfig b/drivers/rng/Kconfig
index 5deb5db..24666bf 100644
--- a/drivers/rng/Kconfig
+++ b/drivers/rng/Kconfig
@@ -48,11 +48,11 @@
 	  accessible to normal world but reserved and used by the OP-TEE
 	  to avoid the weakness of a software PRNG.
 
-config RNG_STM32MP1
-	bool "Enable random number generator for STM32MP1"
-	depends on ARCH_STM32MP
+config RNG_STM32
+	bool "Enable random number generator for STM32"
+	depends on ARCH_STM32 || ARCH_STM32MP
 	help
-	  Enable STM32MP1 rng driver.
+	  Enable STM32 rng driver.
 
 config RNG_ROCKCHIP
 	bool "Enable random number generator for rockchip crypto rng"
diff --git a/drivers/rng/Makefile b/drivers/rng/Makefile
index 78f6105..192f911 100644
--- a/drivers/rng/Makefile
+++ b/drivers/rng/Makefile
@@ -9,7 +9,7 @@
 obj-$(CONFIG_RNG_MSM) += msm_rng.o
 obj-$(CONFIG_RNG_NPCM) += npcm_rng.o
 obj-$(CONFIG_RNG_OPTEE) += optee_rng.o
-obj-$(CONFIG_RNG_STM32MP1) += stm32mp1_rng.o
+obj-$(CONFIG_RNG_STM32) += stm32_rng.o
 obj-$(CONFIG_RNG_ROCKCHIP) += rockchip_rng.o
 obj-$(CONFIG_RNG_IPROC200) += iproc_rng200.o
 obj-$(CONFIG_RNG_SMCCC_TRNG) += smccc_trng.o
diff --git a/drivers/rng/stm32mp1_rng.c b/drivers/rng/stm32_rng.c
similarity index 100%
rename from drivers/rng/stm32mp1_rng.c
rename to drivers/rng/stm32_rng.c