boards/sim: add explicit CRYPTO deps for dropbear defconfig

nuttx-apps#3557 switches NETUTILS_DROPBEAR to depend on CRYPTO and
CRYPTO_RANDOM_POOL instead of selecting them.  sim/dropbear must enable
CONFIG_CRYPTO and CONFIG_CRYPTO_RANDOM_POOL explicitly so olddefconfig and
CI normalize keep dropbear and FSUTILS_PASSWD enabled.

Signed-off-by: Abhishek Mishra <mishra.abhishek2808@gmail.com>

Author: Abhishekmishra2808

boards/sim/sim/sim/configs/dropbear/defconfig

@@ -17,9 +17,11 @@ CONFIG_BOARD_LOOPSPERMSEC=0
 CONFIG_BOOT_RUNFROMEXTSRAM=y
 CONFIG_BUILTIN=y
 CONFIG_CODECS_BASE64=y
+CONFIG_CRYPTO=y
 CONFIG_CRYPTO_CRYPTODEV=y
 CONFIG_CRYPTO_CRYPTODEV_SOFTWARE_CRYPTO=y
 CONFIG_CRYPTO_MBEDTLS=y
+CONFIG_CRYPTO_RANDOM_POOL=y
 CONFIG_CRYPTO_SW_AES=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DEV_GPIO=y