Declare P-256 as accelerated in p256-m test

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 8505e1f..f60bf24 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -3001,6 +3001,7 @@
     # builtin support.
     loc_accel_list="ALG_ECDSA \
                     ALG_ECDH \
+                    ECC_SECP_R1_256 \
                     KEY_TYPE_ECC_KEY_PAIR_BASIC \
                     KEY_TYPE_ECC_KEY_PAIR_IMPORT \
                     KEY_TYPE_ECC_KEY_PAIR_EXPORT \
@@ -3011,6 +3012,7 @@
     # Build crypto library specifying we want to use P256M code for EC operations
     make CFLAGS="$ASAN_CFLAGS $loc_accel_flags -DMBEDTLS_PSA_P256M_DRIVER_ENABLED" LDFLAGS="$ASAN_CFLAGS"
 
+
     # Make sure any built-in EC alg was not re-enabled by accident (additive config)
     not grep mbedtls_ecdsa_ library/ecdsa.o
     not grep mbedtls_ecdh_ library/ecdh.o