arch/x86_64: do not modify CR8 in interrupt path
arch/x86_64: do not modify CR8 in interrupt path

Currently, the interrupt service code manually raises the CPU task
priority to the priority level of the vector being serviced to defer
any lower-priority interrupts. This is unnecessary; the local APIC
is aware that an interrupt is in-service and accounts for its priority
when deciding whether to issue an overriding interrupt to the CPU.

Signed-off-by: Charles E. Youse <cbdb0cc7f3f5b4be81a75fa7242590e3e9882e1e@gnuless.org>

Vudentz/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,Vudentz/zephyr,galak/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,galak/zephyr,Vudentz/zephyr,galak/zephyr,nashif/zephyr,nashif/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr