kirkwood: fix typos on DEBUG_LL_UART_*

We were prompted for which DEBUG_LL_UART implementation we want, fix the
typos such that the build continues.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 42332

target/linux/kirkwood/config-3.14

@@ -62,12 +62,12 @@ CONFIG_CRYPTO_HASH=y
 CONFIG_CRYPTO_HASH2=y
 CONFIG_CRYPTO_LZO=y
 CONFIG_DEBUG_LL_INCLUDE="debug/8250.S"
-CONFIG_DEBUG_UART_8250=y
+CONFIG_DEBUG_LL_UART_8250=y
 # CONFIG_DEBUG_UART_8250_FLOW_CONTROL is not set
 CONFIG_DEBUG_UART_8250_SHIFT=2
 # CONFIG_DEBUG_UART_8250_WORD is not set
 CONFIG_DEBUG_UART_PHYS=0xf1012000
-# CONFIG_DEBUG_UART_PL01X is not set
+# CONFIG_DEBUG_LL_UART_PL01X is not set
 CONFIG_DEBUG_UART_VIRT=0xfed12000
 # CONFIG_DEBUG_USER is not set
 # CONFIG_DLCI is not set