[ARM] mv78xx0: distinguish between different chip steppings

During boot, identify which chip stepping we're running on (determined
by looking at the first PCIe unit's device ID and revision registers),
and print a message with the details about what we found.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
diff --git a/arch/arm/mach-mv78xx0/common.h b/arch/arm/mach-mv78xx0/common.h
index 78af5de..f6274db 100644
--- a/arch/arm/mach-mv78xx0/common.h
+++ b/arch/arm/mach-mv78xx0/common.h
@@ -29,6 +29,8 @@
 void mv78xx0_setup_pcie_mem_win(int window, u32 base, u32 size,
 				int maj, int min);
 
+void mv78xx0_pcie_id(u32 *dev, u32 *rev);
+
 void mv78xx0_ehci0_init(void);
 void mv78xx0_ehci1_init(void);
 void mv78xx0_ehci2_init(void);