pcmcia: only keep saved I365_CSCINT flag if there is no PCI irq

Keeping the saved I365_CSCINT flag around breaks PCMCIA on some system,
and is only needed on a few systems to get PCMCIA to work. This patch
allows PCMCIA to work on both types, and it fixes
https://bugzilla.kernel.org/show_bug.cgi?id=16015

Reported-by: Justin P. Mattock <[e-mail]>
CC: <[e-mail]>
Signed-off-by: Dominik Brodowski <[e-mail]>

drivers/pcmcia/yenta_socket.c

···
 /* probes the PCI interrupt, use only on override functions */
 static int yenta_probe_cb_irq(struct yenta_socket *socket)
 {
-	u8 reg;
+	u8 reg = 0;
 
 	if (!socket->cb_irq)
 		return -1;
···
 	}
 
 	/* generate interrupt, wait */
-	reg = exca_readb(socket, I365_CSCINT);
+	if (!socket->dev->irq)
+		reg = exca_readb(socket, I365_CSCINT);
 	exca_writeb(socket, I365_CSCINT, reg | I365_CSC_STSCHG);
 	cb_writel(socket, CB_SOCKET_EVENT, -1);
 	cb_writel(socket, CB_SOCKET_MASK, CB_CSTSMASK);