sh: provide some clock lookup aliases for legacy CPG parts.

For the CPUs that have not yet been converted off of legacy CPG we
provide some pclk aliases in order to make driver migration easier.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/cpu/clock-cpg.c b/arch/sh/kernel/cpu/clock-cpg.c
index eed5eaf..17a73ad 100644
--- a/arch/sh/kernel/cpu/clock-cpg.c
+++ b/arch/sh/kernel/cpu/clock-cpg.c
@@ -338,6 +338,11 @@
 			ret |= clk_register(clk);
 	}
 
+	clk_add_alias("tmu_fck", NULL, "peripheral_clk", NULL);
+	clk_add_alias("mtu2_fck", NULL, "peripheral_clk", NULL);
+	clk_add_alias("cmt_fck", NULL, "peripheral_clk", NULL);
+	clk_add_alias("sci_ick", NULL, "peripheral_clk", NULL);
+
 	return ret;
 }