ARM: dts: msm: Reduce GSI moderation values for AQC rings

Reduce GSI channel moderation values to lower numbers so that AQC
Rx and Tx ring sizes could be reduced further.

CRs-Fixed: 2436744
Change-Id: Iece0322dcf5804f517ac18f7ca189769861a2a56
Signed-off-by: Jinesh K. Jayakumar <jineshk@codeaurora.org>