common: Drop asm/global_data.h from common header

Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/synopsys/axs10x/axs10x.c b/board/synopsys/axs10x/axs10x.c
index b4a1d4c..75e4d03 100644
--- a/board/synopsys/axs10x/axs10x.c
+++ b/board/synopsys/axs10x/axs10x.c
@@ -9,6 +9,7 @@
 #include <init.h>
 #include <malloc.h>
 #include <asm/arcregs.h>
+#include <asm/global_data.h>
 #include "axs10x.h"
 #include <asm/cache.h>
 
diff --git a/board/synopsys/emsdp/emsdp.c b/board/synopsys/emsdp/emsdp.c
index 91fa94a..997120e 100644
--- a/board/synopsys/emsdp/emsdp.c
+++ b/board/synopsys/emsdp/emsdp.c
@@ -9,6 +9,7 @@
 #include <dwmmc.h>
 #include <init.h>
 #include <malloc.h>
+#include <asm/global_data.h>
 #include <linux/bitops.h>
 
 #include <asm/arcregs.h>
diff --git a/board/synopsys/hsdk/hsdk.c b/board/synopsys/hsdk/hsdk.c
index cd11f9d..892b94b 100644
--- a/board/synopsys/hsdk/hsdk.c
+++ b/board/synopsys/hsdk/hsdk.c
@@ -14,6 +14,7 @@
 #include <irq_func.h>
 #include <log.h>
 #include <asm/cache.h>
+#include <asm/global_data.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/printk.h>
diff --git a/board/synopsys/iot_devkit/iot_devkit.c b/board/synopsys/iot_devkit/iot_devkit.c
index 497ea18..c605136 100644
--- a/board/synopsys/iot_devkit/iot_devkit.c
+++ b/board/synopsys/iot_devkit/iot_devkit.c
@@ -8,6 +8,7 @@
 #include <init.h>
 #include <malloc.h>
 #include <dwmmc.h>
+#include <asm/global_data.h>
 #include <linux/bitops.h>
 #include <linux/libfdt.h>
 #include <fdtdec.h>