sw64: perf: fix the number of supported raw events

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I56X48



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According to CORE3B core software interface manual, the performance
counter PC_1 on sw64 supports event index up to 0x3d. Now fix it,
and remove some unused macros from wrperfmon.h.

Signed-off-by: He Chuyue <hechuyue@wxiat.com>

Signed-off-by: Gu Zitao <guzitao@wxiat.com>