nrf_security: Refactor buffer size for block cipher in Cracen

In the sxsymcrypt driver of Cracen the block cipher was set
as 64 because of the ChaCha20 support. This uses unecessary
stack space when ChaCha20 is not enabled so make this buffer
size configurable based on the enabled algorithms.

Signed-off-by: Georgios Vasilakis <[email protected]>

Author: Vge0rge

subsys/nrf_security/src/drivers/cracen/cracenpsa/include/cracen_psa_primitives.h

@@ -20,8 +20,13 @@
 
 #define SX_BLKCIPHER_IV_SZ	(16U)
 #define SX_BLKCIPHER_AES_BLK_SZ (16U)
+
+#if defined(PSA_NEED_CRACEN_STREAM_CIPHER_CHACHA20)
 /* ChaCha20 has a 512 bit block size */
 #define SX_BLKCIPHER_MAX_BLK_SZ (64U)
+#else
+#define SX_BLKCIPHER_MAX_BLK_SZ SX_BLKCIPHER_AES_BLK_SZ
+#endif
 
 #define CRACEN_MAX_AES_KEY_SIZE (32u)