Revert "ARM: tegra: clock: Don't fail clk_enable when max_rate has been lowered"

This reverts commit 8d351aa5478de533114e614f2607bc85ed23df91.

The above commit introduced recursive call of clk enable/set rate APIs
that may hang the system.

Change-Id: I04eff9e1c3ddee82f6d2e17690122cc41fad203f
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/100710
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
ARM: tegra2: clock: Put Tegra2 clocks to known states

Add TEGRA_PREINIT_CLOCKS option to put host1x, disp1, and video clocks
into known state, so that L4T Ventana/Harmony works on u-boot.

bug 967065

Change-Id: If7637b13e0daf1823fa0fe694a87870f4601e4df
Signed-off-by: Jong Kim <jongk@nvidia.com>
Reviewed-on: http://git-master/r/95734
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>