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/imgtec/boston/ddr.c b/board/imgtec/boston/ddr.c
index 241b384..182f79b 100644
--- a/board/imgtec/boston/ddr.c
+++ b/board/imgtec/boston/ddr.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <init.h>
+#include <asm/global_data.h>
 
 #include <asm/io.h>
 
diff --git a/board/imgtec/boston/dt.c b/board/imgtec/boston/dt.c
index 44b5641..bf772ff 100644
--- a/board/imgtec/boston/dt.c
+++ b/board/imgtec/boston/dt.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <fdt_support.h>
+#include <asm/global_data.h>
 
 int ft_board_setup(void *blob, struct bd_info *bd)
 {
diff --git a/board/imgtec/ci20/ci20.c b/board/imgtec/ci20/ci20.c
index 038dbdd..7ee175d 100644
--- a/board/imgtec/ci20/ci20.c
+++ b/board/imgtec/ci20/ci20.c
@@ -11,6 +11,7 @@
 #include <init.h>
 #include <net.h>
 #include <netdev.h>
+#include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/gpio.h>
 #include <linux/bitops.h>
diff --git a/board/imgtec/malta/malta.c b/board/imgtec/malta/malta.c
index 252cc81..c04f727 100644
--- a/board/imgtec/malta/malta.c
+++ b/board/imgtec/malta/malta.c
@@ -13,6 +13,7 @@
 #include <pci_gt64120.h>
 #include <pci_msc01.h>
 #include <rtc.h>
+#include <asm/global_data.h>
 #include <linux/delay.h>
 
 #include <asm/addrspace.h>
diff --git a/board/imgtec/xilfpga/xilfpga.c b/board/imgtec/xilfpga/xilfpga.c
index 0b68bbd..6a83637 100644
--- a/board/imgtec/xilfpga/xilfpga.c
+++ b/board/imgtec/xilfpga/xilfpga.c
@@ -10,6 +10,7 @@
 
 #include <common.h>
 #include <init.h>
+#include <asm/global_data.h>
 
 DECLARE_GLOBAL_DATA_PTR;