[ARM] pxa/vpac270: remove TS_IRQ magic number

The touchscreen GPIO IRQ was used as a magic number. Define it properly in the
board header file. This is a simple cleanup patch.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
2 files changed