sh: export board_pci_channels in one place

Instead of sometimes exporting board_pci_channels[] in the board specific
code just export it in one place.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index b9aca54..8aaacc9 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -187,3 +187,5 @@
 	iounmap(addr);
 }
 EXPORT_SYMBOL(pci_iounmap);
+
+EXPORT_SYMBOL(board_pci_channels);