sdhc: rename disk_access_sdhc.c

The name disk_access_sdhc.c is ambiguous,

actually this driver depends on SPI,

rename this file.

In addition, move the generic sdhc stuff from C file

to head file for other sdhc drivers to use.

1) disk_access_sdhc.c->disk_access_spi_sdhc.c.

2) create .h and move sdhc specifications from .c to .h.

Signed-off-by: Jun Yang <jun.yang@nxp.com>
8 files changed