disp: msm: dp: remove benign warnings about missing properties

The parser is throwing warning for missing properties in device
tree, which might not be present in all variants. This warning
can be ignored and is downgraded as a debug log.

Change-Id: I1b3f6e9e3d21a0a84585ace4eba15710464d7b51
Signed-off-by: Sandeep Gangadharaiah <sandgang@codeaurora.org>

msm/dp/dp_parser.c

@@ -317,7 +317,7 @@ static int dp_parser_get_vreg(struct dp_parser *parser,
 	pm_supply_name = dp_parser_supply_node_name(module);
 	supply_root_node = of_get_child_by_name(of_node, pm_supply_name);
 	if (!supply_root_node) {
-		DP_WARN("no supply entry present: %s\n", pm_supply_name);
+		DP_DEBUG("no supply entry present: %s\n", pm_supply_name);
 		goto novreg;
 	}