drm/i915: Remove unused enable_cmd_parser modparam

The command parser is feature complete, stable and required by
userspace. In commit 41736a8e3331 ("drm/i915: Use the precomputed value
for whether to enable command parsing") I accidentally removed control
from the modparam, and as no one has complained, remove the left
over modparam completely!

References: 41736a8e3331 ("drm/i915: Use the precomputed value for whether to enable command parsing")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180517150727.10431-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_params.c

@@ -130,9 +130,6 @@ i915_param_named_unsafe(invert_brightness, int, 0600,
 i915_param_named(disable_display, bool, 0400,
 	"Disable display (default: false)");
 
-i915_param_named_unsafe(enable_cmd_parser, bool, 0400,
-	"Enable command parsing (true=enabled [default], false=disabled)");
-
 i915_param_named(mmio_debug, int, 0600,
 	"Enable the MMIO debug code for the first N failures (default: off). "
 	"This may negatively affect performance.");

drivers/gpu/drm/i915/i915_params.h

@@ -58,7 +58,6 @@ struct drm_printer;
 	param(unsigned int, inject_load_failure, 0) \
 	/* leave bools at the end to not create holes */ \
 	param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT)) \
-	param(bool, enable_cmd_parser, true) \
 	param(bool, enable_hangcheck, true) \
 	param(bool, fastboot, false) \
 	param(bool, prefault_disable, false) \