arm/dt: msm8974: Add data to enable dual mode config for Krait

Add the properties and device-tree data to enable
dual mode configuration for Krait. By default all bus masters
are configured in a single mode (Fixed/Bypass/Limiter/Regulator).
By default Krait is configured in Fixed mode.

In cases where BIMC runs at frequencies lower than 250 MHz,
Krait's bandwidth usage should be restricted to a certain
threshold value so that other masters like MDP do not get
starved.

At bandwidth requests below a certain threshold, Krait will
now be configured in Limiter mode, which will restrict its
bus usage. Above the threshold, Krait will be configured
in Fixed mode which will remove any restrictions on
bandwidth usage.

Dual-mode configuration enables setting the Krait in
both Limiter and Fixed mode based on the requirements stated
above.

Change-Id: I5bebafbf74093e3ab7076e021bf4f6a624390f37
Signed-off-by: Gagan Mac <gmac@codeaurora.org>