ARM: lpc18xx: remove DEBUG_LL_UART_8250 from defconfig

Remove the generic 8250 config option so that the LPC18xx
specific option gets picked instead.
Signed-off-by: NJoachim Eastwood <manabian@gmail.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

arch/arm/configs/lpc18xx_defconfig

@@ -146,7 +146,6 @@ CONFIG_MAGIC_SYSRQ=y
 # CONFIG_RCU_CPU_STALL_INFO is not set
 # CONFIG_FTRACE is not set
 CONFIG_DEBUG_LL=y
-CONFIG_DEBUG_LL_UART_8250=y
 CONFIG_EARLY_PRINTK=y
 CONFIG_CRC_ITU_T=y
 CONFIG_CRC7=y