ipa: vimc: Rename ipa_dummy to ipa_vimc

The DummyIPA is actually a test IPA module for the virtual media
controller driver VIMC. Rename it accordingly to its usage.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

test/ipa/ipa_test.cpp

@@ -62,7 +62,7 @@ protected:
 			"GPL-2.0-or-later",
 		};
 
-		count += runTest("src/ipa/ipa_dummy.so", testInfo);
+		count += runTest("src/ipa/ipa_vimc.so", testInfo);
 
 		if (count < 0)
 			return TestFail;