sched: Fix out of bounds issue in for_each_cluster macro

[   31.504753] =================================================================
[   31.512215] BUG: KASAN: global-out-of-bounds in core_ctl_set_boost+0x554/0x558
[   31.519637] Read of size 4 at addr ffffffd0327c18f4 by task init/456
[   31.526160]
[   31.527707] CPU: 1 PID: 456 Comm: init Tainted: G S      W 5.4.12-qgki-debug-gdc9adf3559a6-dirty #25
[   31.537793] Hardware name: Qualcomm Technologies, Inc. 8350 venus (DT)
[   31.544499] Call trace:
[   31.547026]  dump_backtrace+0x0/0x2e0
[   31.550797]  show_stack+0x14/0x20
[   31.554220]  dump_stack+0xf0/0x144
[   31.557732]  print_address_description.isra.7+0x3c/0x3d8
[   31.563190]  __kasan_report+0x158/0x23c
[   31.567144]  kasan_report+0xc/0x18
[   31.570649]  __asan_report_load4_noabort+0x18/0x20
[   31.575572]  core_ctl_set_boost+0x554/0x558
[   31.579881]  z3d22747cee+0x14/0x58
[   31.583385]  z991cee001b+0x884/0xd70
[   31.587071]  sched_boost_handler+0xe4/0x108
[   31.591381]  proc_sys_call_handler+0x384/0x420
[   31.595954]  proc_sys_write+0x10/0x18
[   31.599728]  __vfs_write+0x54/0xe8
[   31.603232]  vfs_write+0x15c/0x430
[   31.606736]  ksys_write+0xe8/0x1c0
[   31.610241]  __arm64_sys_write+0x68/0x98
[   31.614282]  el0_svc_common.constprop.0+0x1c0/0x370
[   31.619302]  el0_svc_handler+0xd4/0x178
[   31.623257]  el0_svc+0x8/0xc

Change-Id: I71e71d61e080c1ce948bd0400f9ebb0705a2210b
Signed-off-by: Kassey Li <yingangl@codeaurora.org>
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>