topology: pre-process-object: check attribute validity

topology: pre-process-object: check attribute validity

Attributes can have constraints set for valid values, min
or max values. If the attribute value is set in an object,
the value must be validated against the set constraints.

An example for attribute constraint would be:
DefineAttribute."direction" {
		constraints {
			valid_values [
				"playback"
				"capture"
			]
			tuple_values [
				0
				1
			]
		}
}

where the tuple_values array would translate the valid_values of
playback as 0 and capture as 1.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>