arm64/mpam: change allocation mode from GFP_KERNEL to GFP_NOWAIT

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9RXHK



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We observed the following stack:
 #0 [ffff80054c9e3af0] __switch_to at ffffa05c1ad69fbc
 #1 [ffff80054c9e3b40] __schedule at ffffa05c1baf4014
 #2 [ffff80054c9e3ba0] __cond_resched at ffffa05c1baf4a70
 #3 [ffff80054c9e3bc0] kmem_cache_alloc_trace at ffffa05c1b130584
 #4 [ffff80054c9e3c20] __resctrl_group_move_task at ffffa05c1ad9a674
 #5 [ffff80054c9e3c70] resctrl_group_rmid_write at ffffa05c1ad9bc40
 #6 [ffff80054c9e3cd0] resctrl_group_file_write at ffffa05c1ad986e4

__resctrl_group_move_task() is called by resctrl_group_rmid_write()
in atomic context where sleep is prohibited.

Ensure calling context won't sleep by changing allocation mode from
GFP_KERNEL to GFP_NOWAIT.

Fixes: eba77f3e ("arm64/mpam: Preparing for MPAM refactoring")
Signed-off-by: Yu Liao <liaoyu15@huawei.com>