[nrf noup] mbedtls: Enable PSA_WANT_GENERATE_RANDOM for PSA RNG

-This is a [nrf noup] because PSA_WANT_GENERATE_RANDOM is a Nordic
 configuration that is not found upstream. This was previously in
 commit 5cfe575 but has been split out

Signed-off-by: Frank Audun Kvamtrø <[email protected]>

Author: frkv

drivers/entropy/Kconfig.psa_crypto

@@ -7,6 +7,7 @@ config ENTROPY_PSA_CRYPTO_RNG
 	bool "PSA Crypto Random source Entropy driver"
 	depends on DT_HAS_ZEPHYR_PSA_CRYPTO_RNG_ENABLED
 	select ENTROPY_HAS_DRIVER
+	select PSA_WANT_GENERATE_RANDOM
 	default y
 	help
 	  Enable the PSA Crypto source Entropy driver.