drm/i915/gt: Move LSC_CHICKEN_BIT* workarounds to correct function

That register doesn't belong to a specific engine, so the proper
placement for workarounds programming it should be
general_render_compute_wa_init().

Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230118155249.41551-3-gustavo.sousa@intel.com