fix build for boxtype "generic"

Origin commit data
------------------
Branch: ni/coolstream
Commit: 0061aac2b3
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2012-10-06 (Sat, 06 Oct 2012)


------------------
No further description and justification available within origin commit message!

------------------
This commit was generated by Migit

src/driver/Makefile.am

@@ -64,6 +64,10 @@ if BOXTYPE_AZBOX
 libneutrino_driver_a_SOURCES += \
 	simple_display.cpp
 endif
+if BOXTYPE_GENERIC
+libneutrino_driver_a_SOURCES += \
+	simple_display.cpp
+endif
 if USE_STB_HAL
 INCLUDES += \
 	-I$(STB_HAL_INC) \

src/driver/simple_display.cpp

@@ -42,6 +42,9 @@
 #define DISPLAY_DEV "/proc/vfd"
 #define LED_DEV "/proc/led"
 #endif
+#if HAVE_GENERIC_HARDWARE
+#define DISPLAY_DEV "/dev/null"
+#endif
 
 static char volume = 0;
 //static char percent = 0;
@@ -436,8 +439,7 @@ void CLCD::Clear()
 	close(fd);
 printf("spark_led:%s\n", __func__);
 }
-#endif
-#if HAVE_AZBOX_HARDWARE
+#else
 void CLCD::Clear()
 {
 	display(" ", false);