msm: ADSPRPC: Fix bugs in page offset

Calculate page start so the offset is always less then the minimum
page size.

Change-Id: I5dc2cf5052a16e9f78862eb79f6141e2b7502ba2
Acked-by: Anatoly Yakovenko <anatolyy@qti.qualcomm.com>
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
1 file changed