Tegra30: Add arch-tegra30 include files

Common Tegra files are in arch-tegra, shared between T20 and T30.
Tegra30-specific headers are in arch-tegra30. Note that some of
these will be filled in as more T30 support is added (drivers,
WB/LP0 support, etc.). A couple of Tegra20 files were changed
to support common headers in arch-tegra, also.

Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/include/asm/arch-tegra/clock.h b/arch/arm/include/asm/arch-tegra/clock.h
index eac1dc2..01f86ab 100644
--- a/arch/arm/include/asm/arch-tegra/clock.h
+++ b/arch/arm/include/asm/arch-tegra/clock.h
@@ -21,8 +21,8 @@
 
 /* Tegra clock control functions */
 
-#ifndef _CLOCK_H
-#define _CLOCK_H
+#ifndef _TEGRA_CLOCK_H_
+#define _TEGRA_CLOCK_H_
 
 /* Set of oscillator frequencies supported in the internal API. */
 enum clock_osc_freq {
@@ -136,7 +136,7 @@
 /**
  * Put parts of the CPU complex into or out of reset.\
  *
- * @param cpu		cpu number (0 or 1 on Tegra2)
+ * @param cpu		cpu number (0 or 1 on Tegra2, 0-3 on Tegra3)
  * @param which		which parts of the complex to affect (OR of crc_reset_id)
  * @param reset		1 to assert reset, 0 to de-assert
  */
@@ -262,4 +262,4 @@
 /* Initialize the PLLs */
 void clock_early_init(void);
 
-#endif	/* _CLOCK_H_ */
+#endif	/* _TEGRA_CLOCK_H_ */