slim: msm: Enable satellite clients to request for specific channel

Since slimbus framework now supports clients to request a specific
channel number, channel number may be different than channel handle.
Channel numbers can range from 0-255 and channel handles returned by
slimbus framework may not be same as channel number. (e.g. if there
are 32 channel resources and the first channel number requested is
120, then it may get channel resource 24.)
This will enable 2 satellite clients (one as producer and one as
consumer) to connect to a specific channel.

Change-Id: I294c4d433daea15bc633dfea8a1e0648ccff3234
Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>