x86: config: Increase maximum number of CPUs to 512

The default number is 64.
At a cloud environment, you may be assigned 128 or more
CPUs so that 64 is not enough.

Reported-by: Zhao Ou <zhaoou@uniontech.com>
Signed-off-by: WangYuli <wangyuli@uniontech.com>

arch/x86/configs/deepin_x86_desktop_defconfig

@@ -68,6 +68,7 @@ CONFIG_JAILHOUSE_GUEST=y
 CONFIG_ACRN_GUEST=y
 CONFIG_PROCESSOR_SELECT=y
 CONFIG_GART_IOMMU=y
+CONFIG_NR_CPUS=512
 CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
 CONFIG_X86_MCELOG_LEGACY=y
 CONFIG_PERF_EVENTS_INTEL_RAPL=m