MLK-20438 drm/bridge: sec-dsim: remove 'FORCEBTA' for packet send

MLK-20438 drm/bridge: sec-dsim: remove 'FORCEBTA' for packet send

Configure 'FORCEBTA' mandatorily for every packet send may
cause some packet send timeout in a low possibility. And
until now, this timeout issue only happens during panel
disable callback with the below error log:

"
imx_sec_dsim_drv 32e10000.mipi_dsi: wait pkthdr tx done time out
panel-raydium-rm67191 32e10000.mipi_dsi.0: [drm:rad_panel_disable] *ERROR* Failed to enter sleep mode (-16)
imx_sec_dsim_drv 32e10000.mipi_dsi: panel disable failed: -16
panel-raydium-rm67191 32e10000.mipi_dsi.0: [drm:rad_panel_unprepare] *ERROR* Panel still enabled!
imx_sec_dsim_drv 32e10000.mipi_dsi: panel unprepare failed: -1
"

The root cause for this error is not clear, but remove
'FORCEBTA' can avoid it and won't cause any side effect.

Signed-off-by: Fancy Fang <chen.fang@nxp.com>
(cherry picked from commit 811696087681cd45a8150afff7a8da3a2a6eb113)