mfd: Add 8520 PRCMU variant to db8500-prcmu

Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Reviewed-by: Mattias Nilssson <mattias.i.nilsson@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/db8500-prcmu.c

@@ -2634,6 +2634,8 @@ static char *fw_project_name(u8 project)
 		return "U9500";
 	case PRCMU_FW_PROJECT_U9500_C2:
 		return "U9500 C2";
+	case PRCMU_FW_PROJECT_U8520:
+		return "U8520";
 	default:
 		return "Unknown";
 	}