msm: camera: csiphy: Protect phy lanes for holi target

Holi target uses 8 bit per phy register format for secure camera
usecases. This change takes care of the secure phy bit mask formation
specific to holi target.

CRs-Fixed: 2757195
Change-Id: Ibe33b7619b484fd6e64d958ce01cba8fb0e72d3b
Signed-off-by: Tony Lijo Jose <tjose@codeaurora.org>