fbdev: msm: Disable EARLY_MAP setting at bootup

Disable the SMMU EARLY_MAP attribute for MDP Unsecure CB
at bootup for continuous splash disabled case. Keeping it
enabled causes SMMU to access the cpu_addr instead of
dma_addr in subsequent memory access resulting in DSI
and MDP failures.

Change-Id: Ica1b29f5862459b71bc6e7ab944eaabd57299028
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>