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/common/board_r.c b/common/board_r.c
index 9fa4d4b..9793439 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -21,6 +21,7 @@
 #include <log.h>
 #include <net.h>
 #include <asm/cache.h>
+#include <asm/global_data.h>
 #include <u-boot/crc.h>
 /* TODO: can we just include all these headers whether needed or not? */
 #if defined(CONFIG_CMD_BEDBUG)