add ARK FMU_V6S and FMU_V6XRT

Author: dakejahl

board_types.txt

@@ -20,6 +20,8 @@ TARGET_HW_ARK_FMU_V6X                  57
 TARGET_HW_ARK_PI6X                     58
 TARGET_HW_ARK_FPV                      59
 TARGET_HW_AUT_FMU_V6S                  60
+TARGET_HW_ARK_FMU_V6S                  61
+TARGET_HW_ARK_FMU_V6XRT                62
 TARGET_HW_AMOV_ICF6                    106
 TARGET_HW_MINDPX_V2                    88
 TARGET_HW_PX4_FLOW_V1                   6
@@ -74,6 +76,8 @@ Reserved "PX4 [BL] FMU v6X.x"          53
 Reserved "ARK [BL] FMU v6X.x"          57
 Reserved "ARK [BL] Pi6X.x"             58
 Reserved "ARK [BL] FPV"                59
+Reserved "ARK [BL] FMU v6S"            61
+Reserved "ARK [BL] FMU v6XRT"          62
 
 Reserved "AMOV [BL] ICF6"              106