Although "nv_seed" is one of "entropy", it doesn't included to the "!defined" lineup in the following config file.
Therefore, when MBEDTLS_ENTROPY_NV_SEED is defined, it is accidently invoked "mbedtls/config-no-entropy.h".
mbed-os\features\mbedtls\inc\mbedtls\config.h
I think that correct processing should go to line 47, not line 40.
Enable the compile-time option MBEDTLS_AES_ROM_TABLES in the mbed TLS
main config.h file in mbed OS. This option has the effect of labelling
the AES tables as 'const' so they are placed in ROM, which saves some
RAM space.