rng: Introduce SPL_DM_RNG
Add SPL variant of DM_RNG so that the DM_RNG can be disabled in SPL
if necessary. This may be necessary due to e.g. size constraints of
the SPL.
Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/rng/Makefile b/drivers/rng/Makefile
index ecae1a3..c1f1c61 100644
--- a/drivers/rng/Makefile
+++ b/drivers/rng/Makefile
@@ -3,7 +3,7 @@
# Copyright (c) 2019, Linaro Limited
#
-obj-$(CONFIG_DM_RNG) += rng-uclass.o
+obj-$(CONFIG_$(SPL_TPL_)DM_RNG) += rng-uclass.o
obj-$(CONFIG_RNG_MESON) += meson-rng.o
obj-$(CONFIG_RNG_SANDBOX) += sandbox_rng.o
obj-$(CONFIG_RNG_MSM) += msm_rng.o