xpl: Rename spl_phase() to xpl_phase()

Rename this function to indicate that it refers to any xPL phase.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/i2c/designware_i2c_pci.c b/drivers/i2c/designware_i2c_pci.c
index 11c9867..c21c412 100644
--- a/drivers/i2c/designware_i2c_pci.c
+++ b/drivers/i2c/designware_i2c_pci.c
@@ -37,7 +37,7 @@
 {
 	struct dw_i2c *priv = dev_get_priv(dev);
 
-	if (spl_phase() < PHASE_SPL) {
+	if (xpl_phase() < PHASE_SPL) {
 		u32 base;
 		int ret;
 
@@ -53,7 +53,7 @@
 				      PCI_COMMAND_MASTER);
 	}
 
-	if (spl_phase() < PHASE_BOARD_F) {
+	if (xpl_phase() < PHASE_BOARD_F) {
 		/* Handle early, fixed mapping into a different address space */
 		priv->regs = (struct i2c_regs *)dm_pci_read_bar32(dev, 0);
 	} else {