config: Enable iProc RNG200 driver in RPi4 configs

We find the iProc RNG200 in the Raspberry Pi 4. Add it to all it's
config so that it can be used.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
[mb: drop rpi_4_32b_defconfig]
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
diff --git a/configs/rpi_4_defconfig b/configs/rpi_4_defconfig
index 2590d0a..46b6cc3 100644
--- a/configs/rpi_4_defconfig
+++ b/configs/rpi_4_defconfig
@@ -36,6 +36,8 @@
 CONFIG_PINCTRL=y
 # CONFIG_PINCTRL_GENERIC is not set
 CONFIG_DM_RESET=y
+CONFIG_DM_RNG=y
+CONFIG_RNG_IPROC200=y
 # CONFIG_REQUIRE_SERIAL_CONSOLE is not set
 CONFIG_USB=y
 CONFIG_DM_USB=y