Revert "LoongArch: Add machine_kexec_mask_interrupts() implementation"

This reverts commit 429bf3f.

6.12.78 backported "kexec: Consolidate machine_kexec_mask_interrupts()
implementation" so the arch-specific implementation is redundant.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: chenhuacai

arch/loongarch/kernel/machine_kexec.c

@@ -136,28 +136,6 @@ void kexec_reboot(void)
 	BUG();
 }
 
-static void machine_kexec_mask_interrupts(void)
-{
-	unsigned int i;
-	struct irq_desc *desc;
-
-	for_each_irq_desc(i, desc) {
-		struct irq_chip *chip;
-
-		chip = irq_desc_get_chip(desc);
-		if (!chip)
-			continue;
-
-		if (chip->irq_eoi && irqd_irq_inprogress(&desc->irq_data))
-			chip->irq_eoi(&desc->irq_data);
-
-		if (chip->irq_mask)
-			chip->irq_mask(&desc->irq_data);
-
-		if (chip->irq_disable && !irqd_irq_disabled(&desc->irq_data))
-			chip->irq_disable(&desc->irq_data);
-	}
-}
 
 #ifdef CONFIG_SMP
 static void kexec_shutdown_secondary(void *regs)