imx: imx8m: add i.MX8MN variants support

Add i.MX8MN variants support

Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c
index e07ca58..e83f693 100644
--- a/arch/arm/mach-imx/cpu.c
+++ b/arch/arm/mach-imx/cpu.c
@@ -95,7 +95,17 @@
 	case MXC_CPU_IMX8MP:
 		return "8MP";	/* Quad-core version of the imx8mp */
 	case MXC_CPU_IMX8MN:
-		return "8MNano";/* Quad-core version of the imx8mn */
+		return "8MNano Quad"; /* Quad-core version */
+	case MXC_CPU_IMX8MND:
+		return "8MNano Dual"; /* Dual-core version */
+	case MXC_CPU_IMX8MNS:
+		return "8MNano Solo"; /* Single-core version */
+	case MXC_CPU_IMX8MNL:
+		return "8MNano QuadLite"; /* Quad-core Lite version */
+	case MXC_CPU_IMX8MNDL:
+		return "8MNano DualLite"; /* Dual-core Lite version */
+	case MXC_CPU_IMX8MNSL:
+		return "8MNano SoloLite"; /* Single-core Lite version */
 	case MXC_CPU_IMX8MM:
 		return "8MMQ";	/* Quad-core version of the imx8mm */
 	case MXC_CPU_IMX8MML: