powerpc/p4080: Add setting of clock-frequency for clockgen node

On QorIQ CoreNet based devices we have a global clocking block.  We want
to keep track of SYSCLK frequency as it is what is used to derive all
other frequencies in the SoC

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/cpu/mpc85xx/fdt.c

@@ -403,6 +403,11 @@ void ft_cpu_setup(void *blob, bd_t *bd)
 		"clock-frequency", bd->bi_brgfreq, 1);
 #endif
 
+#ifdef CONFIG_FSL_CORENET
+	do_fixup_by_compat_u32(blob, "fsl,qoriq-clockgen-1.0",
+		"clock-frequency", CONFIG_SYS_CLK_FREQ, 1);
+#endif
+
 	fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
 
 #ifdef CONFIG_MP