ARM: imx: Remove unused definitions

Most of the definitions for peripheral base addresses, interrupt and
DMA information is no longer used, so get rid of them.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>