Rename ECC Family Macros According to PSA Spec

Rename PSA_ECC_CURVE_xxx to PSA_ECC_FAMILY_xxx, also rename
PSA_KEY_TYPE_GET_CURVE to PSA_KEY_TYPE_ECC_GET_FAMILY and rename
psa_ecc_curve_t to psa_ecc_family_t. Old defines are provided in
include/crypto_compat.h for backward compatibility.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
diff --git a/library/pk.c b/library/pk.c
index b83ba8e..b44948b 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -602,7 +602,7 @@
     const mbedtls_ecp_keypair *ec;
     unsigned char d[MBEDTLS_ECP_MAX_BYTES];
     size_t d_len;
-    psa_ecc_curve_t curve_id;
+    psa_ecc_family_t curve_id;
     psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
     psa_key_type_t key_type;
     size_t bits;