clk: renesas: Use pre-defined offset for RPC clocks

Since commit f7b4e4c0949f ("clk: renesas: Synchronize R-Car Gen3 tables
with Linux 5.12"), the custom macros for RPC clocks were dropped.

Use pre-defined offset for RPC clocks, same as what Linux does, instead
of retrieving it from the macros

Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/clk/renesas/clk-rcar-gen3.c b/drivers/clk/renesas/clk-rcar-gen3.c
index 3611bdb..8125804 100644
--- a/drivers/clk/renesas/clk-rcar-gen3.c
+++ b/drivers/clk/renesas/clk-rcar-gen3.c
@@ -324,7 +324,7 @@
 	case CLK_TYPE_GEN4_RPCD2:
 		rate = gen3_clk_get_rate64(&parent);
 
-		value = readl(priv->base + core->offset);
+		value = readl(priv->base + CPG_RPCCKCR);
 
 		prediv = (value >> CPG_RPC_PREDIV_OFFSET) &
 			 CPG_RPC_PREDIV_MASK;
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h
index a7074e2..007610b 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.h
+++ b/drivers/clk/renesas/rcar-gen3-cpg.h
@@ -53,9 +53,6 @@
 #define DEF_GEN3_SD(_name, _id, _parent, _offset)	\
 	DEF_BASE(_name, _id, CLK_TYPE_GEN3_SD, _parent, .offset = _offset)
 
-#define DEF_GEN3_RPCD2(_name, _id, _parent, _offset)	\
-	DEF_BASE(_name, _id, CLK_TYPE_GEN3_RPCD2, _parent, .offset = _offset)
-
 #define DEF_GEN3_MDSEL(_name, _id, _md, _parent0, _div0, _parent1, _div1) \
 	DEF_BASE(_name, _id, CLK_TYPE_GEN3_MDSEL,	\
 		 (_parent0) << 16 | (_parent1),		\