linux-phytec-ti

drm/tidss: WB: fix frame size kbuild warning

Kbuild test robot reported the following issue:

   drivers/gpu//drm/tidss/tidss_wb_m2m.c: In function 'device_run':
>> drivers/gpu//drm/tidss/tidss_wb_m2m.c:256:1: warning: the frame size
of 1280 bytes is larger than 1024 bytes [-Wframe-larger-than=]
    }
    ^

This is due to the fact that large struct variables were allocated on
the stack in device_run(). To fix this we moved the larger variables to
the wbm2m_ctx struct instead.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Benoit Parrot <bparrot@ti.com>