hw/timer/hpet: Fix comment about capabilities register

HPETState.capability stores the emulated value for "general capabilities
and id register" instead of "main counter register".

Fix the comment to accurately reflect this.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
1 file changed