powerpc: mpic: use IRQCHIP_SKIP_SET_WAKE instead of redundant mpic_irq_set_wake
powerpc: mpic: use IRQCHIP_SKIP_SET_WAKE instead of redundant mpic_irq_set_wake

mpic_irq_set_wake return -ENXIO for non FSL MPIC and sets IRQF_NO_SUSPEND
flag for FSL ones. enable_irq_wake already returns -ENXIO if irq_set_wak
is not implemented. Also there's no need to set the IRQF_NO_SUSPEND flag
as it doesn't guarantee wakeup for that interrupt.

This patch removes the redundant mpic_irq_set_wake and sets the
IRQCHIP_SKIP_SET_WAKE for only FSL MPIC.

Cc: Benjamin Herrenschmidt <a7089bb6e7e92505d88aaff006cbdd60cc9120b6@kernel.crashing.org>
Cc: Paul Mackerras <19a0ba370c443ba08d20b5061586430ab449ee8c@samba.org>
Cc: Michael Ellerman <864f124608374e06e4da1fa5d2e47ed839b95411@ellerman.id.au>
Cc: Scott Wood <b77916c2feab81a70245e7b5671f4f02730ebf64@freescale.com>
Cc: Hongtao Jia <f9323e46e8846ddf91ff3a78bc1f1ac7312398b4@freescale.com>
Cc: Marc Zyngier <a16cc0c82647c52d401177f8e50567df5499e36c@arm.com>
Cc: 624e0123bdcc7ea450e9efbcd399e8858e365d3e@lists.ozlabs.org
Signed-off-by: Sudeep Holla <2f8b50d4d9838571c9f6955972f29e9e41079295@arm.com>
Acked-by: Scott Wood <b77916c2feab81a70245e7b5671f4f02730ebf64@freescale.com>
Signed-off-by: Scott Wood <b77916c2feab81a70245e7b5671f4f02730ebf64@freescale.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs