UBUNTU: SAUCE: (no-up) Input: synaptics - add second variant of two-button clickpad

This is necessary for clickpad detection of Synaptics trackpads in Dell
Mini 10 series of laptops.

no-up comments: Keep both, so long as they continue to apply cleanly.
The patches apply only to a couple of old Dell minis, and Dell has said
they don't intend to use those touchpads again. Upstreaming these
patches stalled due to lack of information/response, and continuing to
pursue it probably isn't worth the effort, so they can be marked no-up.
There's no harm in keeping the patches, but if they become a problem
they can be dropped.
Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Andy Whitcroft <andy.whitcroft@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

drivers/input/mouse/synaptics.h

@@ -85,6 +85,7 @@
  */
 #define SYN_CAP_CLICKPAD(ex0c)		((ex0c) & 0x100000) /* 1-button ClickPad */
 #define SYN_CAP_CLICKPAD2BTN(ex0c)	((ex0c) & 0x000100) /* 2-button ClickPad */
+#define SYN_CAP_CLICKPAD2BTN2(ex0c)	((ex0c) & 0x200000) /* 2-button ClickPad */
 #define SYN_CAP_MAX_DIMENSIONS(ex0c)	((ex0c) & 0x020000)
 #define SYN_CAP_MIN_DIMENSIONS(ex0c)	((ex0c) & 0x002000)
 #define SYN_CAP_ADV_GESTURE(ex0c)	((ex0c) & 0x080000)