msm: msm_bus: Fix division by Zero error in kernel
msm: msm_bus: Fix division by Zero error in kernel

Avoid the error by checking for zero slave ports before
dividing bandwidth.

CRs-Fixed: 495496
Change-Id: I8e9b1e61ba3b47ed270d2f8cf60ed975b5c49889
Signed-off-by: Gagan Mac <25654062aaab5b88ce23a6158fc3ffbc07a79839@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas