mdss: Support continuous splash for 8974 V2
mdss: Support continuous splash for 8974 V2

The interface offsets for MDSS MDP have changed from V1 and V2.
Adding check to determine the correct offset address.

Change-Id: I395b8f8ffa26b2cfb652b9688f982c0dfe7965b2
Signed-off-by: Siddhartha Agrawal <a8ed12d758a73535cc62b11b855e297f76b7093b@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