mx6: soc: Move mxs_dma_init() into the mxs nand driver

Currently the following build error is seen when a board using MMC SPL
is built and the MXS nand driver is also selected:

arch/arm/cpu/armv7/built-in.o: In function `arch_cpu_init':
arch/arm/cpu/armv7/mx6/soc.c:432: undefined reference to 'mxs_dma_init'

On mx6 the only user of mxs_dma_init() is the mxs nand driver, so
move it there.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
2 files changed