video: msm: Ensure histogram is fully enabled before kicking off
video: msm: Ensure histogram is fully enabled before kicking off

Histogram hardware needs to have histogram enabled before kicking off
histogram collection. Add state variable to track if histogram is ready to
collect.

Change-Id: I71380e89de1a61f446802f791e917f57d14f10a2
Signed-off-by: Carl Vanderlip <c1ee614365181d9b29d91b6c5237384ed28bec62@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