msm: mdss: move warnings and errors out of mdss spinlock

Current display driver prints warnings and errors within
the mdss spinlock. This causes in random cases to hold the
spinlock for long time when multiple errors are printed;
Fix this by moving the print of warning and error messages
outside of the spinlock.

Change-Id: I09359b528b4742f72a76690930f3d0ed90bb2caa
Signed-off-by: Ingrid Gallardo <ingridg@codeaurora.org>