clk: agilex: Add NAND clock support

Add get nand_clk and nand_x clock support.

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Chee Hong Ang <chee.hong.ang@intel.com>

drivers/clk/altera/clk-agilex.c

@@ -533,7 +533,10 @@ static ulong socfpga_clk_get_rate(struct clk *clk)
 	case AGILEX_EMAC2_CLK:
 		return clk_get_emac_clk_hz(plat, clk->id);
 	case AGILEX_USB_CLK:
+	case AGILEX_NAND_X_CLK:
 		return clk_get_l4_mp_clk_hz(plat);
+	case AGILEX_NAND_CLK:
+		return clk_get_l4_mp_clk_hz(plat) / 4;
 	default:
 		return -ENXIO;
 	}