msm: camera: isp: Change master slave combination for dual IFE

For some targets, there is a requirement to have the lower IFE
as master. Current implementation selects the higher IFE as
the master.
This commit changes the acquire logic to reserve the lower IFE
first and then the higher IFE as slave. This logic is for dual
ife use cases. For single IFE use case, acquire logic is not
changed.
Also, removes the hard coded check for master hw index
during the irq  handling. Stores the master hw index
in ife hardware manager context and check against it.

Change-Id: Ifd3a28e80a0a4d16e3d9278b7ed61290c620ec79
CRs-Fixed: 2582959
Signed-off-by: Gaurav Jindal <gjindal@codeaurora.org>
Signed-off-by: Vishalsingh Hajeri <vhajeri@codeaurora.org>