clk: qcom: mdss: avoid release of the dynamic fps PLL code memory

Avoid the release of memory for dynamic fps PLL codes. The memory
is part of the continuous splash memory region and will be freed
eventually as part of the splash screen memory cleanup routine.

Change-Id: I67afb46057770298668ae5790637e8b4b08fd030
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>