Revert "remove unused"

This reverts commit 3f9525e42e.

azbox/hardware_caps.c

@@ -32,6 +32,7 @@ hw_caps_t *get_hwcaps(void)
 	caps.display_xres = 8;
 	caps.can_set_display_brightness = 0;
 	caps.display_can_deepstandby = 0;
+	caps.display_can_set_brightness = 0;
 	strcpy(caps.boxvendor, "AZBox");
 	const char *tmp;
 	char buf[64];

generic-pc/hardware_caps.c

@@ -29,6 +29,7 @@ hw_caps_t *get_hwcaps(void)
 	caps.has_HDMI = 1;
 	caps.display_xres = 8;
 	caps.display_can_deepstandby = 0;
+	caps.display_can_set_brightness = 0;
 	caps.can_set_display_brightness = 0;
 	strcpy(caps.boxvendor, "Generic");
 	strcpy(caps.boxname, "PC");

include/hardware_caps.h

@@ -37,6 +37,7 @@ typedef struct hw_caps
 	int display_xres;	/* x resolution or chars per line */
 	int display_yres;
 	int display_can_deepstandby;
+	int display_can_set_brightness;
 	int can_set_display_brightness;
 	char boxvendor[64];
 	char boxname[64];

libspark/hardware_caps.c

@@ -39,6 +39,7 @@ hw_caps_t *get_hwcaps(void)
 	caps.display_xres = 4;
 	caps.can_set_display_brightness = 0;
 	caps.display_can_deepstandby = 0;
+	caps.display_can_set_brightness = 0;
 	caps.force_tuner_2G = 1; /* I have patched the drivers to fix this, but not everyone has */
 	strcpy(caps.boxvendor, "SPARK");
 	const char *tmp;

libtriple/hardware_caps.c

@@ -25,6 +25,7 @@ static hw_caps_t caps = {
 	.display_yres = 64,
 	.can_set_display_brightness = 0,
 	.display_can_deepstandby = 0;
+	.display_can_set_brightness = 0;
 	.boxvendor = "Armas",
 	.boxname = "TripleDragon",
 	.boxarch = "ppc405"

raspi/hardware_caps.c

@@ -31,6 +31,7 @@ hw_caps_t *get_hwcaps(void)
 	caps.display_xres = 8;
 	caps.can_set_display_brightness = 0;
 	caps.display_can_deepstandby = 0;
+	caps.display_can_set_brightness = 0;
 	strcpy(caps.boxvendor, "Raspberry");
 	strcpy(caps.boxname, "Pi");
 	if (! uname(&u))