The AES uclass Makefile is already keyed by CONFIG_$(PHASE_)DM_AES,
but there is no SPL_DM_AES symbol to build it for SPL.

Add the SPL variant so SPL code can use UCLASS_AES providers, for
example when decrypting FIT images before loading U-Boot proper. Select
SPL_CRYPTO from SPL_DM_AES as well, since drivers/Makefile only descends
into drivers/crypto/ for SPL when SPL_CRYPTO is enabled.

Signed-off-by: James Hilliard <[email protected]>
---
Changes v1 -> v2:
  - Select SPL_CRYPTO from SPL_DM_AES  (suggested by Simon Glass)
---
 drivers/crypto/aes/Kconfig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/crypto/aes/Kconfig b/drivers/crypto/aes/Kconfig
index 7e1b1b2875d..254cb598568 100644
--- a/drivers/crypto/aes/Kconfig
+++ b/drivers/crypto/aes/Kconfig
@@ -4,6 +4,14 @@ config DM_AES
        help
          If you want to use driver model for AES crypto operations, say Y.
 
+config SPL_DM_AES
+       bool "Enable Driver Model for AES crypto operations in SPL"
+       depends on SPL_DM
+       select SPL_CRYPTO
+       help
+         If you want to use driver model for AES crypto operations in SPL,
+         say Y.
+
 config AES_SOFTWARE
        bool "Enable driver for AES in software"
        depends on DM_AES && AES

-- 
2.53.0

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