Revert "tslib: needs kernel headers 3.12"

This reverts commit 7c60211c.

tslib-1.4 removes this dependency.

Add upstream patch that fixes input macros declaration for older kernels.

The ts_uinput tool requires 3.6 headers; disable for older kernels.

Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com>
[baruch: add tslib patch; disable ts_uinput]
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>