platform: msm_shared: mdp5: Correct interface base check
platform: msm_shared: mdp5: Correct interface base check

For chipsets, where destination split is enabled, the programming
is currently not done properly as interface base address check
is wrong. Interface base address passed to tg_setup function is
sum of INTF_BASE and offset (mdp_set_intf_base), and instead
checking only with INTF_BASE. This is causing boot up issue on
2k panel on 8939. Correct this to fix the issue.

Change-Id: I99271d88cd93710894157eaaedc27441fd701173

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