Fix up backport of 1361917030 ("interconnect: Teach lockdep about icc_bw_lock order")

Add a missing include to fix the following build error:

drivers/interconnect/core.c: In function 'icc_init':
drivers/interconnect/core.c:1148:9: error: implicit declaration of function 'fs_reclaim_acquire' [-Werror=implicit-function-declaration]
 1148 |         fs_reclaim_acquire(GFP_KERNEL);
      |         ^~~~~~~~~~~~~~~~~~
drivers/interconnect/core.c:1150:9: error: implicit declaration of function 'fs_reclaim_release' [-Werror=implicit-function-declaration]
 1150 |         fs_reclaim_release(GFP_KERNEL);
      |         ^~~~~~~~~~~~~~~~~~

Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/interconnect/core.c

@@ -13,6 +13,7 @@
 #include <linux/interconnect.h>
 #include <linux/interconnect-provider.h>
 #include <linux/list.h>
+#include <linux/sched/mm.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>