ddr: altera: Rename initialize() to phy_mgr_initialize()

Just perform the rename to make the name more descriptive,
no functional change.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/ddr/altera/sequencer.c b/drivers/ddr/altera/sequencer.c
index 2aa93c1..885bdd8 100644
--- a/drivers/ddr/altera/sequencer.c
+++ b/drivers/ddr/altera/sequencer.c
@@ -113,7 +113,7 @@
 	clrsetbits_le32(&sdr_reg_file->cur_stage, 0xff00, set_sub_stage << 8);
 }
 
-static void initialize(void)
+static void phy_mgr_initialize(void)
 {
 	debug("%s:%d\n", __func__, __LINE__);
 	/* USER calibration has control over path to memory */
@@ -3463,7 +3463,7 @@
 
 	writel(ctrlcfg & 0xFFBFFFFF, &sdr_ctrl->ctrl_cfg);
 
-	initialize();
+	phy_mgr_initialize();
 	rw_mgr_mem_initialize();
 
 	pass = mem_calibrate();