clk: renesas: rcar-gen3-cpg: Remove obsolete rcar_gen3_read_mode_pins()

All R-Car Gen3 clock drivers now obtain the values of the mode pins from
the R-Car RST driver.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

drivers/clk/renesas/rcar-gen3-cpg.c

@@ -333,23 +333,6 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
 					 __clk_get_name(parent), 0, mult, div);
 }
 
-/*
- * Reset register definitions.
- */
-#define MODEMR	0xe6160060
-
-u32 __init rcar_gen3_read_mode_pins(void)
-{
-	void __iomem *modemr = ioremap_nocache(MODEMR, 4);
-	u32 mode;
-
-	BUG_ON(!modemr);
-	mode = ioread32(modemr);
-	iounmap(modemr);
-
-	return mode;
-}
-
 int __init rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
 			      unsigned int clk_extalr)
 {

drivers/clk/renesas/rcar-gen3-cpg.h

@@ -33,7 +33,6 @@ struct rcar_gen3_cpg_pll_config {
 
 #define CPG_RCKCR	0x240
 
-u32 rcar_gen3_read_mode_pins(void);
 struct clk *rcar_gen3_cpg_clk_register(struct device *dev,
 	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
 	struct clk **clks, void __iomem *base);