arch: x86: declare z_interrupt_stacks

Declare z_interrupt_stacks as extern.

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

arch/x86/core/prep_c.c

@@ -14,6 +14,9 @@
 #include <zephyr/cache.h>
 #include <zephyr/arch/common/init.h>
 
+K_KERNEL_PINNED_STACK_ARRAY_DECLARE(z_interrupt_stacks,
+		CONFIG_MP_MAX_NUM_CPUS,
+		CONFIG_ISR_STACK_SIZE);
 
 extern void x86_64_irq_init(void);