MGS-3083 [#imx-662] fix kernel build error with kasan config

MGS-3083 [#imx-662] fix kernel build error with kasan config

hal/kernel/gc_hal_kernel_command.c: In function gckCOMMAND_Commit:
hal/kernel/gc_hal_kernel_command.c:2718:1:
error: the frame size of 2288 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]

removed _commandBufferObject instrance, use kmalloc to avoid kasan error.

Date: Jul 13, 2017
Signed-off-by: Xianzhong <xianzhong.li@nxp.com>
(cherry picked from commit d8d57e43a24bd02b375d7c6bd633ed236db19337)
(cherry picked from commit 484e3073adf47d27581482f268b01fe5fe219d18)
Signed-off-by: Arulpandiyan Vadivel <arulpandiyan_vadivel@mentor.com>