ARM: dts: msm: Remove adsp ion heap 22 for SDM670

Remove adsp ion heap 22 as complete adsp heap is reserved to adsp
remote heap.

Change-Id: I8e6e506b78b8ef68d9c9914775690a36ff2ada0e
Acked-by: Himateja Reddy <hmreddy@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>