fm: fdt: Move fman ucode fixup to driver code

Not only powerpc/mpc85xx but also Freescale Layerscape platforms will
use fdt_fixup_fman_firmware() to insert Fman ucode blob into the device
tree. So move the function to Fman driver code.

Signed-off-by: Gong Qianyu <Qianyu.Gong@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

include/fsl_fman.h

@@ -460,4 +460,5 @@ typedef struct ccsr_fman {
 	u8			res5[4*1024];
 } ccsr_fman_t;
 
+void fdt_fixup_fman_firmware(void *blob);
 #endif /*__FSL_FMAN_H__*/