backlight: ipaq_micro: Make structure micro_bl_props constant

Static structure micro_bl_props, having type backlight_properties, is
used only once, when it is passed as the last argument to function
devm_backlight_device_register(). devm_backlight_device_register() is
defined with its last parameter being declared constant. Hence make
micro_bl_props itself constant as well.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <[e-mail]>
Reviewed-by: Daniel Thompson <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/video/backlight/ipaq_micro_bl.c

···
 	.update_status  = micro_bl_update_status,
 };
 
-static struct backlight_properties micro_bl_props = {
+static const struct backlight_properties micro_bl_props = {
 	.type = BACKLIGHT_RAW,
 	.max_brightness = 255,
 	.power = FB_BLANK_UNBLANK,