IPC: Fix merge problems.

IPC: Fix merge problems.

The latest version in 2.6.35 tree is using if-else statement in function
scu_ipc_ioctl, however in AC tree switch-case statement is used instead,
need to add break instruction accordingly.
Also CPU type checking is introduced in 2.6.35 tree, need to merge that
change for INTEL_SCU_IPC_FW_UPDATE.
In Linux 3.0 pm_qos_add_request doesn't allocate memory any more, the
function requires a pre-allocated struct pm_qos_request_list. make change
in intel_scu_ipc_init accordingly.

Change-Id: Ia36a46030f52ad3f68c0c8e9d101bb049460e2ec
Signed-off-by: Fei Yang <fei.yang@intel.com>