ARM: dts: msm: Change glink intent size for diag on sdmmagpie

Modify glink intent request size for the diag channels from
1k to 16k for sdmmagpie.

Change-Id: I7887c7ffeca5b8f00b4fa634b1e04a45aba1475c
Signed-off-by: Manoj Prabhu B <bmanoj@codeaurora.org>