powerpc/85xx: fdt_set_phy_handle() should return an error code

fdt_set_phy_handle() makes several FDT calls that could fail, so it should
not be hiding these errors.

Signed-off-by: Timur Tabi <timur@freescale.com>
diff --git a/board/freescale/common/fman.h b/board/freescale/common/fman.h
index 19ef7c4..d39ef08 100644
--- a/board/freescale/common/fman.h
+++ b/board/freescale/common/fman.h
@@ -20,7 +20,7 @@
 #ifndef __FMAN_BOARD_HELPER__
 #define __FMAN_BOARD_HELPER__
 
-void fdt_set_phy_handle(void *fdt, char *compat, phys_addr_t addr,
+int fdt_set_phy_handle(void *fdt, char *compat, phys_addr_t addr,
 			const char *alias);
 
 #endif