[M487] Change return error code to MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED when ECC H/W acceleratioin is failed

MBEDTLS_ERR_SSL_HW_ACCEL_FAILED is for hardware accelerators that do TLS record processing.
Replace it with MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED when ECC H/W acceleratioin is failed.

Author: ccli8

features/mbedtls/targets/TARGET_NUVOTON/TARGET_M480/ecp/ecp_internal_alt.c

@@ -684,7 +684,7 @@ NU_STATIC int internal_run_eccop(const mbedtls_ecp_group *grp,
     CRPT->ECC_CTL = (grp->pbits << CRPT_ECC_CTL_CURVEM_Pos) | eccop | CRPT_ECC_CTL_FSEL_Msk | CRPT_ECC_CTL_START_Msk;
     ecc_done = crypto_ecc_wait();
 
-    MBEDTLS_MPI_CHK(ecc_done ? 0 : MBEDTLS_ERR_SSL_HW_ACCEL_FAILED);
+    MBEDTLS_MPI_CHK(ecc_done ? 0 : MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED);
 
     /* (X1, Y1) hold the normalized result. */
     MBEDTLS_MPI_CHK(internal_mpi_read_eccreg(&R->X, (uint32_t *) CRPT->ECC_X1, NU_ECC_BIGNUM_MAXWORD));
@@ -792,7 +792,7 @@ NU_STATIC int internal_run_modop(mbedtls_mpi *r,
     CRPT->ECC_CTL = (pbits << CRPT_ECC_CTL_CURVEM_Pos) | (ECCOP_MODULE | modop) | CRPT_ECC_CTL_FSEL_Msk | CRPT_ECC_CTL_START_Msk;
     ecc_done = crypto_ecc_wait();
 
-    MBEDTLS_MPI_CHK(ecc_done ? 0 : MBEDTLS_ERR_SSL_HW_ACCEL_FAILED);
+    MBEDTLS_MPI_CHK(ecc_done ? 0 : MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED);
 
     /* X1 holds the result. */
     MBEDTLS_MPI_CHK(internal_mpi_read_eccreg(r, (uint32_t *) CRPT->ECC_X1, NU_ECC_BIGNUM_MAXWORD));