Fixes this compilation error:
linux/include/linux/mfd/mcp.h:22:16: error: field 'attached_device' has incomplete type
linux/include/linux/mfd/mcp.h:48:23: error: field 'drv' has incomplete type
Signed-off-by: Andrea Adami <andrea.adami@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>