Crypto: Bump up mbedTLS heap size

The initial attestation test case seems to require a higher heap memory
allocation with the recent mbedTLS upgrade. This patch bumps up the heap
size of mbedTLS by 0x10 bytes.

Signed-off-by: Soby Mathew <soby.mathew@arm.com>
Change-Id: I9aadda19598062d8a4299274c11980149ba076a8
diff --git a/secure_fw/partitions/crypto/crypto_init.c b/secure_fw/partitions/crypto/crypto_init.c
index 743ce1d..ee4d205 100644
--- a/secure_fw/partitions/crypto/crypto_init.c
+++ b/secure_fw/partitions/crypto/crypto_init.c
@@ -268,7 +268,7 @@
  *        Crypto for its dynamic allocations
  */
 #ifndef TFM_CRYPTO_ENGINE_BUF_SIZE
-#define TFM_CRYPTO_ENGINE_BUF_SIZE (0x2000) /* 8KB for EC signing in attest */
+#define TFM_CRYPTO_ENGINE_BUF_SIZE (0x2010) /* >8KB for EC signing in attest */
 #endif
 
 /**