armv8: fsl: Use correct conditional compile for ls1012a

According current code base, CONFIG_LS1012A should be
CONFIG_ARCH_LS1012A, or function fsl_fdt_disable(blob) will be
wrongly called to disable all dwc3 USB nodes on LS1012A, which
cause Linux USB function stop working at all.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/cpu/armv8/fsl-layerscape/fdt.c

@@ -418,7 +418,7 @@ void ft_cpu_setup(void *blob, bd_t *bd)
 #ifdef CONFIG_SYS_DPAA_FMAN
 	fdt_fixup_fman_firmware(blob);
 #endif
-#ifndef CONFIG_LS1012A
+#ifndef CONFIG_ARCH_LS1012A
 	fsl_fdt_disable_usb(blob);
 #endif
 #ifdef CONFIG_HAS_FEATURE_GIC64K_ALIGN