sdm: In MapRect use floorf to ignore decimal point in float

While mapping a rectangle from source domain to destination
domain due to multiplication and division operation on can lead
to floating point numbers, which is not supported by HW.
Hence round it off to using floorf

Change-Id: Ic0ef91953732f567b6cd3c1e29706415a9b64ae7
Crs-fixed: 2513239
1 file changed