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/drivers/cache/cache-v5l2.c b/drivers/cache/cache-v5l2.c
index cb9ebbb..2c7983d 100644
--- a/drivers/cache/cache-v5l2.c
+++ b/drivers/cache/cache-v5l2.c
@@ -9,6 +9,7 @@
 #include <cache.h>
 #include <dm.h>
 #include <hang.h>
+#include <asm/global_data.h>
 #include <asm/io.h>
 #include <dm/ofnode.h>
 #include <linux/bitops.h>
diff --git a/drivers/cache/sandbox_cache.c b/drivers/cache/sandbox_cache.c
index 9050c4c..0fb767e 100644
--- a/drivers/cache/sandbox_cache.c
+++ b/drivers/cache/sandbox_cache.c
@@ -7,6 +7,7 @@
 #include <cache.h>
 #include <dm.h>
 #include <errno.h>
+#include <asm/global_data.h>
 
 DECLARE_GLOBAL_DATA_PTR;