x86: I/O APIC: remove redundant 8259A {,un}masking

For a better control the masking and unmasking of the timer interrupt
line in the 8259A operating in the 'Virtual Wire' mode has been moved out
of setup_ExtINT_IRQ0_pin() now, so remove the redundant calls from the
function.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/io_apic_32.c

@@ -1310,8 +1310,6 @@ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, in
 
 	memset(&entry,0,sizeof(entry));
 
-	disable_8259A_irq(0);
-
 	/* mask LVT0 */
 	apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
 
@@ -1337,8 +1335,6 @@ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, in
 	 * Add it to the IO-APIC irq-routing table:
 	 */
 	ioapic_write_entry(apic, pin, entry);
-
-	enable_8259A_irq(0);
 }
 
 void __init print_IO_APIC(void)

arch/x86/kernel/io_apic_64.c

@@ -906,8 +906,6 @@ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, in
 
 	memset(&entry, 0, sizeof(entry));
 
-	disable_8259A_irq(0);
-
 	/* mask LVT0 */
 	apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
 
@@ -933,8 +931,6 @@ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, in
 	 * Add it to the IO-APIC irq-routing table:
 	 */
 	ioapic_write_entry(apic, pin, entry);
-
-	enable_8259A_irq(0);
 }
 
 void __apicdebuginit print_IO_APIC(void)