msm: lmh_lite: Pass proper size for dma memory free API call

Use proper size for dma memory free call API while saving lmh sensors
list in lmh hardware driver otherwise it leads to memory leak or
unexpected crash if scm_call error path is executed.

CRs-Fixed: 982320
Change-Id: I31ac79585c8899b44ece745676d9af79fe8bca78
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>