[PATCH] yenta: don't mess with bridge control register

In interrupt probing (both ISA and PCI) the bridge control register is used
to change interrupt routing to ISA or PCI by changing bit 7.  But this bit
only controls the routing of card functional interrupts, not the CSC
interrupts which are used for interrupt probing.

A bad side effect of messing with this register in yenta_probe_irq() is
that it can lead to irq storms if a card is inserted and already powered by
the BIOS.

Usage in yenta_sock_init() and yenta_config_init() seem to be fishy as well.

Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>