Fixed a merge error for LPC11U34_421.

Author: dave-wu

targets/targets.json

@@ -109,7 +109,7 @@
         "extra_labels": ["NXP", "LPC11UXX"],
         "macros": ["CMSIS_VECTAB_VIRTUAL", "CMSIS_VECTAB_VIRTUAL_HEADER_FILE=\"cmsis_nvic.h\""],
         "supported_toolchains": ["ARM", "uARM", "GCC_ARM"],
-        "device_has": ["ANALOGIN", "ERROR_PATTERN", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SLEEP", "SPI", "SPISLAVE"],
+        "device_has": ["ANALOGIN", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SLEEP", "SPI", "SPISLAVE"],
         "default_lib": "small",
         "device_name": "LPC11U34FBD48/311"
     },