HEXIWEAR: Enable the entropy collector for use in mbed TLS

Signed-off-by: Mahadevan Mahesh <[email protected]>

Author: mmahadevan108

targets/targets.json

@@ -592,7 +592,7 @@
         "default_toolchain": "ARM",
         "detect_code": ["0214"],
         "progen": {"target": "hexiwear-k64f"},
-        "device_has": ["ANALOGIN", "ANALOGOUT", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
+        "device_has": ["ANALOGIN", "ANALOGOUT", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES", "TRNG"],
         "default_lib": "std",
         "release_versions": ["2", "5"]
     },
@@ -1995,7 +1995,7 @@
     "NRF51_DONGLE": {
         "inherits": ["MCU_NRF51_32K_UNIFIED"],
         "progen": {"target": "nrf51-dongle"},
-        "device_has": ["ERROR_PATTERN", "I2C", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SLEEP", "SPI", "SPI_ASYNCH", "SPISLAVE"],        
+        "device_has": ["ERROR_PATTERN", "I2C", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SLEEP", "SPI", "SPI_ASYNCH", "SPISLAVE"],
         "release_versions": ["2", "5"]
     },
     "MCU_NRF52": {
@@ -2091,7 +2091,7 @@
         "device_has": ["ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "TRNG"],
         "features": ["LWIP"],
         "release_versions": ["2", "5"]
-    },    
+    },
     "NCS36510": {
         "inherits": ["Target"],
         "core": "Cortex-M3",