staging:android:ion: Fix comparison with NULL

This patch fixes the following comparison with NULL issues:

CHECK: Comparison to NULL could be written "compatible[i].name"
+	for (i = 0; compatible[i].name != NULL; i++) {

CHECK: Comparison to NULL could be written "!compatible[i].name"
+	if (compatible[i].name == NULL)

Signed-off-by: Yannis Damigos <giannis.damigos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>