TinyCrypt Test: Skip pkwrite test cases that don't apply to TinyCrypt

The current pkwrite tests involving ECC all use curves different
from Secp256r1, so they don't apply to TinyCrypt.

Adding tests for TinyCrypt is left to a later commit.
diff --git a/tests/suites/test_suite_pkwrite.data b/tests/suites/test_suite_pkwrite.data
index c8ff177..0c1c02b 100644
--- a/tests/suites/test_suite_pkwrite.data
+++ b/tests/suites/test_suite_pkwrite.data
@@ -7,15 +7,15 @@
 pk_write_pubkey_check:"data_files/rsa4096_pub.pem"
 
 Public key write check EC 192 bits
-depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP192R1_ENABLED
+depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP192R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
 pk_write_pubkey_check:"data_files/ec_pub.pem"
 
 Public key write check EC 521 bits
-depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP521R1_ENABLED
+depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP521R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
 pk_write_pubkey_check:"data_files/ec_521_pub.pem"
 
 Public key write check EC Brainpool 512 bits
-depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_BP512R1_ENABLED
+depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_BP512R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
 pk_write_pubkey_check:"data_files/ec_bp512_pub.pem"
 
 Private key write check RSA
@@ -27,13 +27,13 @@
 pk_write_key_check:"data_files/rsa4096_prv.pem"
 
 Private key write check EC 192 bits
-depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP192R1_ENABLED
+depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP192R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
 pk_write_key_check:"data_files/ec_prv.sec1.pem"
 
 Private key write check EC 521 bits
-depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP521R1_ENABLED
+depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_SECP521R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
 pk_write_key_check:"data_files/ec_521_prv.pem"
 
 Private key write check EC Brainpool 512 bits
-depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_BP512R1_ENABLED
+depends_on:MBEDTLS_ECP_C:MBEDTLS_BASE64_C:MBEDTLS_ECP_DP_BP512R1_ENABLED:!MBEDTLS_USE_TINYCRYPT
 pk_write_key_check:"data_files/ec_bp512_prv.pem"