common: Drop bootstage.h from common header

Move this fairly uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/apollolake/fsp_s.c b/arch/x86/cpu/apollolake/fsp_s.c
index 7ef169b..fd6e73d 100644
--- a/arch/x86/cpu/apollolake/fsp_s.c
+++ b/arch/x86/cpu/apollolake/fsp_s.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <binman.h>
+#include <bootstage.h>
 #include <dm.h>
 #include <irq.h>
 #include <malloc.h>
diff --git a/arch/x86/cpu/apollolake/spl.c b/arch/x86/cpu/apollolake/spl.c
index d32f2a9..a555e6c 100644
--- a/arch/x86/cpu/apollolake/spl.c
+++ b/arch/x86/cpu/apollolake/spl.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <binman_sym.h>
+#include <bootstage.h>
 #include <dm.h>
 #include <malloc.h>
 #include <spi.h>
diff --git a/arch/x86/cpu/coreboot/timestamp.c b/arch/x86/cpu/coreboot/timestamp.c
index e8ccaf2..0162597 100644
--- a/arch/x86/cpu/coreboot/timestamp.c
+++ b/arch/x86/cpu/coreboot/timestamp.c
@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <bootstage.h>
 #include <asm/arch/timestamp.h>
 #include <asm/arch/sysinfo.h>
 #include <linux/compiler.h>
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index 2e5d0dd..e0f23bb 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -19,6 +19,7 @@
  */
 
 #include <common.h>
+#include <bootstage.h>
 #include <command.h>
 #include <cpu_func.h>
 #include <dm.h>