msm: Fix reservation logic for ADSP heap

We define ADSP heap type as CMA. So, fix the boot time
reservation logic to not to include its size for any
reservation.

CRs-Fixed: 475240
Change-Id: I2ff92892858e83b772b3161d526c36ee9cf44c71
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>