drm/i915: clean up inconsistent indenting

There is a statement that is indented one character too deeply,
clean this up.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210902215737.55570-1-colin.king@canonical.com

drivers/gpu/drm/i915/gt/intel_execlists_submission.c

@@ -2565,7 +2565,7 @@ __execlists_context_pre_pin(struct intel_context *ce,
 	if (!__test_and_set_bit(CONTEXT_INIT_BIT, &ce->flags)) {
 		lrc_init_state(ce, engine, *vaddr);
 
-		 __i915_gem_object_flush_map(ce->state->obj, 0, engine->context_size);
+		__i915_gem_object_flush_map(ce->state->obj, 0, engine->context_size);
 	}
 
 	return 0;