media: staging: atomisp: Fix DMI matching entry for MRD7

MRD7 board has in particular

	Base Board Information
		Manufacturer: Intel Corp.
		Product Name: TABLET
		Version: MRD 7

Fix the DMI matching entry for it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>