mdss: display-port: fix MSA settings for 5.4 Ghz link rate

The NVID settings for 5.4 Ghz link rate doesn't need
the multiplying factor since this is handled in the
pll dividers. Add changes to remove the multiplying
factor in controller driver.

Change-Id: I695c08323e0e6ea30d6fdafc0eecaa4c8e04aaa5
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>