msm: camera: csiphy: Secure cam usecase not working

Secure CP control register always assume that it contains 7 bit
mask for each PHY. But this register format is different based on
target. Update secure CP control bitmask generation logic for each
PHY index based on phy_version.
So we have below 3 combinations to handle at SW.
1.Old Titan Targets : 7 bits for each PHY.
2.PHY 1_2_1 : for 4 pHYS 7 bits and for
remaining 2 PHYs 8 bits are reserved.
3.Mimas (PHY 2_0_1): 8 bits for each PHY.

CRs-Fixed: 2624698
Change-Id: Iac4c3c718fc96a51592e07b45458fb045c52366d
Signed-off-by: Anil Kumar Kanakanti <akanakan@codeaurora.org>