[U-Boot] [BUG] qemu-x86_64_defconfig fails with panic("TSC frequency is ZERO");

[Heinrich Schuchardt]

Hello Bin, Simon,

sometimes qemu-x86_64_defconfig fails with panic("TSC frequency is
ZERO") in drivers/timer/tsc_timer.c.

The system may hang in an endless reboot loop with this error or recover
after reboot.

Do we need to panic? Or could we use some default value?

Qemu version used for testing: 2.8.1.

Best regards

Heinrich