msm_fb: hdmi: Break infinite loop

Currently, if HDMI PLL lock fails, it will retry. It retries until
the PLL is locked. This may result in infinite loop. This change will
limit the retries to max 10.

Change-Id: I1745643cba7bbc5272f1252208759a83258e9fcb
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>