platforms: create emmc/ufs variant for each platform

For each platform, create either emmc or ufs subfolder to indicate the
variant.

Signed-off-by: Nicolas Dechesne <[email protected]>
Signed-off-by: Ricardo Salveti <[email protected]>

Author: ndechesne

Makefile

@@ -31,7 +31,7 @@ lint:
 
 integration: all
 	# make sure generated output has created expected files
-	tests/integration/check-missing-files platforms/*/*.xml
+	tests/integration/check-missing-files platforms/*/*/*.xml
 
 check: lint integration