serial: samsung: Remove redundant DEBUG_LL check

Commit 84f57d9e3685 ("tty: serial/samsung: fix modular build") fixed
build issues when the driver was built as a module. One of those was
that printascii is only accessible when the driver is built-in.

But there is no need to check for defined(CONFIG_DEBUG_LL) since the
SERIAL_SAMSUNG_DEBUG Kconfig symbol already depends on DEBUG_LL.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/samsung.c

@@ -53,7 +53,6 @@
 #include "samsung.h"
 
 #if	defined(CONFIG_SERIAL_SAMSUNG_DEBUG) &&	\
-	defined(CONFIG_DEBUG_LL) &&		\
 	!defined(MODULE)
 
 extern void printascii(const char *);