x86: apl: Fix the header order in pmc

The dm.h header should come first. In fact it needs to, since otherwise
the driver model definitions are not available to dt-structs.h

Fix this, since it causes problems with OF_PLATDATA_INST.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/apollolake/pmc.c

@@ -9,8 +9,8 @@
 #define LOG_CATEGORY UCLASS_ACPI_PMC
 
 #include <common.h>
-#include <dt-structs.h>
 #include <dm.h>
+#include <dt-structs.h>
 #include <log.h>
 #include <spl.h>
 #include <acpi/acpi_s3.h>