Revert "ARM: dts: imx53: add srtc node"

Revert "ARM: dts: imx53: add srtc node"

commit e501506d3ea00eefa64463ebd9e5c13ee70990bd upstream.

This reverts commit 5b725054147deaf966b3919e10a86c6bfe946a18.

The rtc block on i.MX53 is a completely different hardware than the
one found on i.MX25.

Reported-by: Noel Vellemans <Noel.Vellemans@visionbms.com>
Suggested-by: Juergen Borleis <jbe@pengutronix.de>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>