r Russell King <rmk+kernel@arm.linux.org.uk> 1309338397 +0100

ARM: entry: no need to increase preempt count for IRQ handlers

irq_enter() and irq_exit() already take care of the preempt_count
handling for interrupts, which increment and decrement the hardirq
bits of the preempt count.  So we can remove the preempt count handing
in our IRQ entry/exit assembly, like x86 did some 9 years ago.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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