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>

test/cmd/test_echo.c

@@ -7,6 +7,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <asm/global_data.h>
 #include <display_options.h>
 #include <test/lib.h>
 #include <test/test.h>