Rename ADD_SUB_DEFAULT to ADD_SUB_DATA

Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
diff --git a/scripts/mbedtls_dev/bignum_data.py b/scripts/mbedtls_dev/bignum_data.py
index 28076a4..6f132a6 100644
--- a/scripts/mbedtls_dev/bignum_data.py
+++ b/scripts/mbedtls_dev/bignum_data.py
@@ -106,7 +106,7 @@
         RANDOM_1024_BIT_SEED_4_NO2, # largest (not a prime)
         ]
 
-ADD_SUB_DEFAULT = [
+ADD_SUB_DATA = [
     "0", "1", "3", "f", "fe", "ff", "100", "ff00", 
     "fffe", "ffff", "10000", # 2^16 - 1, 2^16, 2^16 + 1
     "fffffffe", "ffffffff", "100000000", # 2^32 - 1, 2^32, 2^32 + 1