ANDROID: mmc: Add CONFIG_MMC_SIMULATE_MAX_SPEED

When CONFIG_MMC_SIMULATE_MAX_SPEED is enabled, Expose max_read_speed,
max_write_speed and cache_size default module parameters and sysfs
controls to simulate a slow eMMC device. Default values are 0 (off),
0 (off) and 4 MB respectively.

Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 26976972
Change-Id: I342bfbd8b85f9b790e3f0e1e4e51a900ae07e05d
5 files changed