drivers/timer/apic_tsc: use ICR as a fallback timeout event source

This adds support for the local APIC in one-shot mode as the timeout
event source for those cases where the CPU supports invariant TSC but
no TSC deadline capability. It is presented as another timer choice.
Existing Kconfig symbols were preserved to minimize board config
disturbance.

This hybrid approach was implemented kind of backward in the apic_timer
driver but it is far cleaner to carry this here.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>

boards/intel/adl/Kconfig.defconfig

@@ -16,6 +16,8 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 if APIC_TIMER
 config APIC_TIMER_IRQ
 	default 24
+endif
+if APIC_TIMER_TSC
 config APIC_TIMER_TSC_M
 	default 3
 config APIC_TIMER_TSC_N

boards/intel/ehl/Kconfig.defconfig

@@ -27,6 +27,8 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 if APIC_TIMER
 config APIC_TIMER_IRQ
 	default 24
+endif
+if APIC_TIMER_TSC
 config APIC_TIMER_TSC_M
 	default 3
 config APIC_TIMER_TSC_N

boards/intel/rpl/Kconfig.defconfig

@@ -17,6 +17,8 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 if APIC_TIMER
 config APIC_TIMER_IRQ
 	default 24
+endif
+if APIC_TIMER_TSC
 config APIC_TIMER_TSC_M
 	default 3
 config APIC_TIMER_TSC_N

boards/up-bridge-the-gap/up_squared/Kconfig.defconfig

@@ -18,6 +18,8 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 if APIC_TIMER
 config APIC_TIMER_IRQ
 	default 24
+endif
+if APIC_TIMER_TSC
 config APIC_TIMER_TSC_M
 	default 3
 config APIC_TIMER_TSC_N

boards/up-bridge-the-gap/up_squared_pro_7000/Kconfig.defconfig

@@ -19,6 +19,8 @@ if APIC_TIMER
 
 config APIC_TIMER_IRQ
 	default 24
+endif
+if APIC_TIMER_TSC
 config APIC_TIMER_TSC_M
 	default 3
 config APIC_TIMER_TSC_N