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/siemens/capricorn/spl.c b/board/siemens/capricorn/spl.c
index 8435bd3..8e077d7 100644
--- a/board/siemens/capricorn/spl.c
+++ b/board/siemens/capricorn/spl.c
@@ -9,6 +9,7 @@
 #include <init.h>
 #include <spl.h>
 #include <dm.h>
+#include <asm/global_data.h>
 #include <dm/uclass.h>
 #include <dm/device.h>
 #include <dm/uclass-internal.h>
diff --git a/board/siemens/common/board.c b/board/siemens/common/board.c
index e0bd859..1bdf404 100644
--- a/board/siemens/common/board.c
+++ b/board/siemens/common/board.c
@@ -25,6 +25,7 @@
 #include <asm/arch/gpio.h>
 #include <asm/arch/mmc_host_def.h>
 #include <asm/arch/sys_proto.h>
+#include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/emif.h>
 #include <asm/gpio.h>
diff --git a/board/siemens/corvus/board.c b/board/siemens/corvus/board.c
index 25d85a8..a6e1737 100644
--- a/board/siemens/corvus/board.c
+++ b/board/siemens/corvus/board.c
@@ -14,6 +14,7 @@
 #include <dm.h>
 #include <init.h>
 #include <log.h>
+#include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/arch/at91sam9g45_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
diff --git a/board/siemens/smartweb/smartweb.c b/board/siemens/smartweb/smartweb.c
index c6bdd97..d500a62 100644
--- a/board/siemens/smartweb/smartweb.c
+++ b/board/siemens/smartweb/smartweb.c
@@ -19,6 +19,7 @@
 #include <dm.h>
 #include <init.h>
 #include <net.h>
+#include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/arch/at91sam9_sdramc.h>
 #include <asm/arch/at91sam9260_matrix.h>
diff --git a/board/siemens/taurus/taurus.c b/board/siemens/taurus/taurus.c
index 91e29f0..cad16f9 100644
--- a/board/siemens/taurus/taurus.c
+++ b/board/siemens/taurus/taurus.c
@@ -17,6 +17,7 @@
 #include <env.h>
 #include <flash.h>
 #include <init.h>
+#include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/arch/at91sam9260_matrix.h>
 #include <asm/arch/at91sam9_smc.h>