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/arch/arm/include/asm/arch-tegra/clock.h b/arch/arm/include/asm/arch-tegra/clock.h
index 8aa90d5..1d80d9e 100644
--- a/arch/arm/include/asm/arch-tegra/clock.h
+++ b/arch/arm/include/asm/arch-tegra/clock.h
@@ -8,6 +8,8 @@
 #ifndef _TEGRA_CLOCK_H_
 #define _TEGRA_CLOCK_H_
 
+struct udevice;
+
 /* Set of oscillator frequencies supported in the internal API. */
 enum clock_osc_freq {
 	/* All in MHz, so 13_0 is 13.0MHz */