sony-laptop: VGN-A317M hotkey support

This laptop has 5 SPIC managed buttons above the keyboard:
sound + and - as well as brightness, zoom and S1.
Possibly the entire VGN-A serie behaves the same.

Signed-off-by: Harald Jenny <harald@a-little-linux-box.at>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/include/linux/sonypi.h b/include/linux/sonypi.h
index bb83501..34c4475 100644
--- a/include/linux/sonypi.h
+++ b/include/linux/sonypi.h
@@ -108,6 +108,9 @@
 #define SONYPI_EVENT_PKEY_P4			66
 #define SONYPI_EVENT_PKEY_P5			67
 #define SONYPI_EVENT_SETTINGKEY_PRESSED		68
+#define SONYPI_EVENT_VOLUME_INC_PRESSED		69
+#define SONYPI_EVENT_VOLUME_DEC_PRESSED		70
+#define SONYPI_EVENT_BRIGHTNESS_PRESSED		71
 
 /* get/set brightness */
 #define SONYPI_IOCGBRT		_IOR('v', 0, __u8)