drivers: Use CONFIG_XPL_BUILD instead of CONFIG_SPL_BUILD

Use the new symbol to refer to any 'SPL' build, including TPL and VPL

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
index 125215e..be15ebd 100644
--- a/drivers/clk/imx/clk-imx8mn.c
+++ b/drivers/clk/imx/clk-imx8mn.c
@@ -37,7 +37,7 @@
 						    "sys_pll2_250m", "sys_pll2_200m", "audio_pll1_out",
 						    "video_pll_out", "sys_pll3_out", };
 
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 static const char * const imx8mn_enet_ref_sels[] = {"clock-osc-24m", "sys_pll2_125m", "sys_pll2_50m",
 						    "sys_pll2_100m", "sys_pll1_160m", "audio_pll1_out",
 						    "video_pll_out", "clk_ext4", };
@@ -97,7 +97,7 @@
 						"sys_pll3_out", "audio_pll1_out", "video_pll_out",
 						"audio_pll2_out", "sys_pll1_133m", };
 
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 static const char * const imx8mn_pwm1_sels[] = {"clock-osc-24m", "sys_pll2_100m", "sys_pll1_160m",
 						"sys_pll1_40m", "sys_pll3_out", "clk_ext1",
 						"sys_pll1_80m", "video_pll_out", };
@@ -359,7 +359,7 @@
 		imx_clk_gate4("usb1_ctrl_root_clk", "usb_bus", base + 0x44d0, 0));
 
 	/* clks not needed in SPL stage */
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 	clk_dm(IMX8MN_CLK_ENET_REF,
 	       imx8m_clk_composite("enet_ref", imx8mn_enet_ref_sels,
 	       base + 0xa980));