ARM: tegra11: clock: Don't apply common limit to cbus users

ARM: tegra11: clock: Don't apply common limit to cbus users

The cbus dvfs table is currently constructed to guarantee safe
operations of the slowest client at any rate, and cbus maximum
rate at nominal voltage is applied as common limit to all cbus
shared users.

The latter provision is changed now: each shared user has its
own limit set equal to the maximum rate of the the respective
graphics module. Thus, individual users rate requests are no
longer throttled by the slowest one. Still final bus rate is
subject to worst case dvfs table, so this commit just allow for
unthrottled user request recording with no actual change in
final rates/voltages.

Change-Id: I89c463d2c52f4028ebaf433c69ac99b6131281e5
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/101863
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>