ram: k3-ddrss: Handle error properly in lpddr4_start

In lpddr4_start function error returned by lpddr4_enablepiinitiator
may go undetected due to overwrite of return code.
Add support to handle error in above case.

Reported-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Udit Kumar <u-kumar1@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
diff --git a/drivers/ram/k3-ddrss/lpddr4.c b/drivers/ram/k3-ddrss/lpddr4.c
index 11ef242..9f9abfe 100644
--- a/drivers/ram/k3-ddrss/lpddr4.c
+++ b/drivers/ram/k3-ddrss/lpddr4.c
@@ -155,10 +155,11 @@
 	u32 result = 0U;
 
 	result = lpddr4_startsf(pd);
-	if (result == (u32)0) {
+	if (result == (u32)0)
 		result = lpddr4_enablepiinitiator(pd);
+	if (result == (u32)0)
 		result = lpddr4_startsequencecontroller(pd);
-	}
+
 	return result;
 }