soc: qcom: Update QMI response max buffer length

Increase the size of response buffer to MAX_LENGTH, otherwise,
decoding of QMI response could fail, if received response is of
large size.

Change-Id: I49bbfbca36707fde1293e72d38cf597e3c963269
Signed-off-by: Jitendra Sharma <shajit@codeaurora.org>