[PATCH] ppc32: minor arch/ppc/syslib/xilinx_pic.c cleanups

[Andrei Konovalov]

For level sensitive interrupts the patch moves unmasking the interrupt behind
acknowledging it. It seems not to change anything in practice (experimented with
the ethernet a little bit), but looks more logical IMHO.

The second hunk removes two lines that do nothing.

Signed-off-by: Andrei Konovalov <akonovalov at ru.mvista.com>

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