sparc64: Deselect IRQ_PREFLOW_FASTEOI

sparc64 hasn't needed to select this since commit:

  ee6a9333 ("sparc64: sparse irq")

which got rid of the calls to __irq_set_preflow_handler() first installed
by commit:

  fcd8d4f4 ("sparc: Use the new genirq functionality")

Deselect this option.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Anatoly Pugachev <matorola@gmail.com> 
Link: https://lkml.kernel.org/r/20200703155645.29703-2-valentin.schneider@arm.com

arch/sparc/Kconfig

@@ -80,7 +80,6 @@ config SPARC64
 	select RTC_DRV_STARFIRE
 	select HAVE_PERF_EVENTS
 	select PERF_USE_VMALLOC
-	select IRQ_PREFLOW_FASTEOI
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select HAVE_C_RECORDMCOUNT
 	select HAVE_ARCH_AUDITSYSCALL