ARM: dts: imx53-qsb: Make DA9053 regulator functional

Setup the GPIO7_11 pin as interrupt to the DA9053 and also rename the regulator nodes
so that they match with the datasheet.

This allows probing of DA9053 to succeed.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>