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/spi/zynq_spi.c b/drivers/spi/zynq_spi.c
index 2971e55..52b8fbc 100644
--- a/drivers/spi/zynq_spi.c
+++ b/drivers/spi/zynq_spi.c
@@ -14,6 +14,7 @@
 #include <spi.h>
 #include <time.h>
 #include <clk.h>
+#include <asm/global_data.h>
 #include <asm/io.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>